Answer:2
Step-by-step explanation:
1+1=2
if the five teachers have an average salary of $49,000, should we be concerned that the sample does not accurately reflect the population?
As a result, we should not be concerned that the sample does not accurately reflect the population.
We can learn more about average, population, and sample.
What is the population?
The entire group of people, items, or objects that we want to draw a conclusion about is known as the population. For example, if we want to learn about the average age of people in the United States, then the entire population is every individual in the United States.
What is a sample?
A smaller group of individuals, objects, or items that are selected from the population is known as a sample. A random sample is a sample in which every individual in the population has an equal chance of being selected for the sample.
What is an average?
A statistic that summarizes the central tendency of a group of numbers is known as an average.
The mean is the most commonly used average in statistics. The mean is calculated by adding up all the numbers in a group and then dividing by the number of numbers in the group. If we want to learn about the average salary of all teachers in the United States, we'd have to sample every teacher. That's not a feasible option. Instead, we take a smaller sample, which should be representative of the population, and then use the information gathered from that sample to make predictions about the population as a whole.
If we assume that the five teachers in the example are a random sample of all teachers in the United States, then we can conclude that the average salary of all teachers in the United States is around $49,000. As a result, we should not be concerned that the sample does not accurately reflect the population.
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Gerald had some green and yellow beads. The number of green beads was 1/3 the number of yellow beads. He gave each of his friends 2 green beads and 3 yellow beads. He then had 42 green beads and 270 yellow beads left.
a. How many friends did he give the beads to?
b. What was the total number of beads he had at first?
Answer:
Step-by-step explanation:
Let's use algebra to solve this problem.
Let's start by assigning variables to the unknown quantities. Let G be the initial number of green beads and Y be the initial number of yellow beads.
We know that the number of green beads is 1/3 the number of yellow beads:
G = (1/3)Y
After giving away some beads, he had 42 green beads and 270 yellow beads left. So we can set up two equations using this information:
G - 2f = 42
Y - 3f = 270
where f is the number of friends he gave the beads to.
Now we can substitute G = (1/3)Y into the first equation:
(1/3)Y - 2f = 42
Multiplying both sides by 3, we get:
Y - 6f = 126
Now we have two equations that we can solve simultaneously:
Y - 3f = 270
Y - 6f = 126
Subtracting the first equation from the second, we get:
3f = 144
So f = 48. He gave the beads to 48 friends.
To find the total number of beads he had at first, we can use the equation G = (1/3)Y:
G + Y = (4/3)Y = (4/3)(270) = 360
So he had a total of 360 beads at first.
4. Small amounts of weight are often measured in grams or ounces. Recall from Exercise #6
that there are 16 ounces per pound. Grams are even smaller. Camilla weighs an onion and
finds that it is 112 grams. On another scale, she finds that it weighs four ounces.
(a) Using the information from Camilla's onion,determine the ratio of grams to ounces.State as a unit rate using proper “per” units
Thus, Camilla's onion weighs about 28 grammes per ounce in terms of grammes to ounces.
What exactly is weight?Weight is the force of gravity that pulls objects towards the centre of the Earth. The resulting force that pulls a substance towards Earth is known as gravity. In contrast to gravity force, which occurs among any two masses, this only occurs between Planet and a mass.
To convert from grams to ounces, we can use the conversion factor of 1 ounce = 28.35 grams. Therefore:
1 gram = 1/28.35 ounces
To find the ratio of grams to ounces for Camilla's onion, we can divide the weight in grams by the weight in ounces:
112 grams ÷ 4 ounces ≈ 28 grams per ounce
So the ratio of grams to ounces for Camilla's onion is approximately 28 grams per ounce.
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8x + 4 + 8x - 1 simplify the variable expression
I do not understand this
Pls help!
Answer:
16x + 3
Step-by-step explanation:
Simplify by combining like terms. Add the terms with x, then add the integers.
8x + 8x + 4 - 1 = 16x + 3
a)Find the number c that satisfies the conclusion of the Mean Value Theorem for this function f(x) = x + 3/x and the interval [1,14]
The number c that satisfies the conclusion of the Mean Value Theorem for the function f(x) = x + 3/x on the interval [1, 14] is approximately c = 3.75.
To find the number c that satisfies the conclusion of the Mean Value Theorem for the function f(x) = x + 3/x on the interval [1, 14], follow these steps:
1. Verify the conditions of the Mean Value Theorem:
The function f(x) = x + 3/x is continuous on the closed interval [1, 14] and differentiable on the open interval (1, 14).
2. Calculate the average rate of change of the function on the interval:
f(14) = 14 + 3/14 ≈ 14.214
f(1) = 1 + 3/1 = 4
Average rate of change = (f(14) - f(1)) / (14 - 1) ≈ (14.214 - 4) / 13 ≈ 0.786
3. Differentiate the function to find the instantaneous rate of change:
f'(x) = 1 - 3/x²
4. Set f'(x) equal to the average rate of change and solve for x:
1 - 3/x² = 0.786
x² = 3 / (1 - 0.786)
x² ≈ 14.056
x ≈ √14.056 ≈ 3.75
The number c that satisfies the conclusion of the Mean Value Theorem for the function f(x) = x + 3/x on the interval [1, 14] is approximately c = 3.75.
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1. What is the diameter of the circle above?
2.
What is the radius of the circle above?
Answer:
diameter = 34 radius = 17
Step-by-step explanation:
Look at the line in the middle of the circle that is the diameter, diameter is a straight line passing from side to side through the center of a circle.
radius is the distance from the center of the circle to any point on its circumference.
Solve for x.
2x^2-28x+98=0
X=
11 POINT’S
⇒First take out the highest common factor 2 form the quadratic equation and divide each and every term of that equation by that common factor.
⇒Factorise the equation and equate the factors of the equation to 0 and solve for the unknown variable x.
⇒Below are the steps on solving for the unknown variable.
[tex]2(x^{2} -14x+49)=0 \\\frac{2(x^{2} -14x+49)}{2} =\frac{0}{2} \\x^{2} -14x+49=0\\(x-7)(x-7)=0\\x-7=0\\x=7[/tex]
Answer options
2 units
4 units
6 units
10 units
As the length of the side immediately across from the angle, choice (c) 6 units is the correct answer.
what is triangle ?Three straight lines that cross at three different locations create the two-dimensional geometric outline of a triangle. A triangle's vertices, which are the three places at which those three lines intersect, are referred to as the triangle's sides. The dimensions of a triangle's edges and angles can be used to classify it. For instance, an isosceles triangle has two equal sides and two equal angles while an equilateral triangle has three equal sides and three equal angles of 60 degrees. An angle or side of a scalene triangle cannot be equivalent.
given
The right-angled triangle XYZ in the provided illustration has a side length of 6 units and an angle opposite to it that is labelled as 30°. The extent of the side YZ, denoted as x, must be determined.
To find x, we can use the trigonometric sine relation. The length of the side directly across from the angle divided by the length of the hypotenuse is known as the sine of an angle. The hypotenuse in this instance is designated as 2x.
As a result, we have:
sin 30° = (6/2x)
Adding two times to both sides:
2x * sin 30° = 6
Using sin 30°, which has a value of 0.5:
x = (6/(2 * 0.5)) = 6/1 = 6
Consequently, the side YZ is 6 units long.
As the length of the side immediately across from the angle, choice (c) 6 units is the correct answer.
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Please solve with workings out
Answer:
1500 g
Step-by-step explanation:
part a) is correct
part b)
The ratio of syrup to oats for one flapjack is 1:4
That means for each g of syrup you will require 4 g of oats
For 12 flapjacks you require 250 g
Therefore quantity of oats needed for 12 flapjacks = 250 x 4 = 1000 g
If you were to make 18 flapjacks then you would need 18/12 x quantity needed for 12 flapjacks
18/12 = 3/2 (dividing numerator and denominator by 6)
Quantity of oats needed for 18 flapjacks
= 18/12 x 1000
= 3/ 2 x 1000
= 3 x 500
= 1500 g
How will the product of 7 x
Choose 1 answer:
64
5
compare to 7, and why?
It will be less because we are multiplying 7 by a fraction that is less
than 1.
It will be equal because we are multiplying 7 by a fraction that is
equal to 1.
It will be greater because we are multiplying 7 by a fraction that is
greater than 1.
According to the question the product of 7 x 5 will be greater than 7 from multiplication.
Explain Multiplication?Multiplication in mathematics is the addition of equal groups. As we proliferate, the quantity of items in the group increases. The product as well as the two elements are part of a multiplication issue. 6 and 9 are factors in the multiplication equation 6 9 = 54, and 54 is the result.
The product of 7 x 5 by multiplying with each other we can get 35
The number being multiplied with 7 is greater than 1 so the product will also be greater than 7.
The product of 7 x 5 will be greater than 7 because we are multiplying 7 by a number greater than 1.
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Right triangle STD has a longer leg measuring exactly 3√5 cm. The altitude from right angle T to hypotenuse
SD cuts the hypotenuse into two segments where the shorter part is 1 less than the longer part. Find the exact
length of each part of the hypotenuse, SU and UD, the exact length of altitude TU and the exact length of ST.
Answer:
Let's call the length of the hypotenuse SD as x.
Since the altitude from T to SD divides SD into two parts, let the length of the shorter part be y. Then the length of the longer part is x-y.
Using similar triangles, we have:
TU/TS = ST/TD
Substituting the values we have:
TU/(3√5) = √5/UD
TU = (3/5)UD
Using the Pythagorean theorem in triangle TUS, we have:
TU² + (3√5)² = TS²
(3/5 UD)² + 45 = ST²
9/25 UD² + 45 = ST²
Using the Pythagorean theorem in triangle TUD, we have:
TU² + UD² = TD²
(3/5 UD)² + UD² = x²
9/25 UD² + UD² = x²
34/25 UD² = x²
UD² = (25/34)x²
Substituting the value of UD² in the equation ST² = 9/25 UD² + 45, we get:
ST² = 9/25 (25/34)x² + 45
ST² = 45/34 x² + 45
Since y = x-y-1, we have y = (x-1)/2.
Using the Pythagorean theorem in triangle TUD, we have:
(1/4) (x-1)² + UD² = x²
(1/4) (x² - 2x + 1) + (25/34)x² = x²
(1/4)(x²) + (25/34)x² - (1/2)x + (1/4) = 0
(59/68)x² - (1/2)x + (1/4) = 0
Using the quadratic formula, we get:
x = [1/2 ± √(1/4 - 4(59/68)(1/4))]/(2(59/68))
x = [1/2 ± (3√34)/17]/(59/34)
x = 17/59 ± 6√34/59
Since x is the hypotenuse SD, we have:
UD² = (25/34) x²
UD² = (25/34) [(17/59 ± 6√34/59)²]
UD² = 136/59 ± 204√34/295
Therefore, the exact lengths of the two parts of the hypotenuse are:
SD = x = 17/59 ± 6√34/59
SU = x-y = (x-1)/2 = 8/59 ± 3√34/59
UD = y = (x-1)/2 = 8/59 ± 3√34/59
TU = (3/5) UD = (3/5) [8/59 ± 3√34/59] = 24/295 ± 9√34/295
ST² = 45/34 x² + 45 = 45/34 [(17/59 ± 6√34/59)²] + 45
ST = √[45/34 [(17/59 ± 6√34/59)²] + 45]
100 points please help
In its simplest form of the quadratic equation, the answers to the equation 15z2 + 6z - 8 = 4z are z = 7/11 and z = -13/11.
Is an equation quadratic a formula?The polynomial equations of degree two in one variable of type f(x) = ax2 + bx + c = 0 and with a, b, c, and R R and a 0 are known as quadratic equations. In its most basic form, it is a quadratic equation where "a" denotes the leading coefficient and "c" is the absolute term of f. (x).
We must first transform the problem into the form ax2 + bx + c = 0 where a, b, and c are constants before we can solve 15z2 + 6z - 8 = 4z using the quadratic formula.
Here are the facts:
a = 15 - 4 = 11
b = 6
c = -8
The quadratic formula is amended with the following values:
[tex]z = (-b ± √(b^2 - 4ac)) / 2a[/tex]
We get:
[tex]z = (-6 ± √(6^2 - 4(11)(-8))) / 2(11)[/tex]
Simplifying:
z = (-6 ± √(400)) / 22
z = (-6 ± 20) / 22
Thus, the solutions are:
z = (-6 + 20) / 22 = 7/11
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solve the pair of simultaneous equations:(step by step, using factorization method)
y²+2y+11=x
x=5-3y
Answer: (-3,-2)
Step-by-step explanation:
y²+2y+11 = 5-3y
y^2+2y+11-5+3y =0
y^2+5y+6=0
y^2+3y+2y+6=0
y(y+3)+2(y+3)=0
(y+3)(y+2)=0
y= -3, -2
All you do is plug in the x value to the equation
Hope it helps:)
- The Graduates Choice designs and sells two types of class rings, the GPA and the MVP. They
can produce up to 24 rings per day using at most 60 total hours of labor. It takes 3 hours to
make one GPA ring and 2 hours to make one MVP ring. How many of each ring type should be
made daily in order to maximize the company's profit if the profit on the GPA ring is $40 and
the profit on the MVP ring is $35?
The 12 of each type of the ring would give max profit for the company.
How many of each type should be made daily to maximize the company's profit?Let x = number of VIP rings: let y = number of SST rings
:
The total production inequality;
x + y =< 24
y = 24 - x; arranged to plot graph (purple)
:
The labor inequality;
3x + 2y =< 60
2y = 60 - 3x
y = 60/2 - (3/2)x
y = 30 - 1.5x; arranged to plot the graph (red).
From the graph, the 3 corners of the area of feasibility (at or below the lines whichever is lower):
: x/y;.....profit on each type;... total profit
0,24; 40(0) + 35(24) = 0 + 840 = $840
12,12; 40(12) + 35(12) = 480 + 420 = $900
20,0; 40(20) + 35(0) = 800 + 35(0) = $800.
Therefore, the 12 of each type of the ring would give max profit for the company.
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what happens to the sector area of a circle if you double its radius? what happens to the arc length of a circle if you double its radius? why do you think that happens?
The sector area of a circle is quadrupled when the radius is doubled. When the radius is doubled, the arc length of a circle is also doubled. This happens because the sector area and arc length are both dependent on the radius of a circle. Therefore, any change in the radius of a circle affects both its sector area and arc length.
Let us understand both these concepts in detail:
Sector area of a circle: A sector is a region of a circle, and the area enclosed by two radii and an arc is known as a sector area. The formula for the sector area of a circle is given by:
Sector Area = (θ/360)πr²
where θ is the central angle in degrees,
r is the radius of the circle,
and is a constant value.
If we double the radius of a circle, the sector area increases by a factor of 4. This is because the sector area is directly proportional to the square of the radius.
Hence, doubling the radius of a circle results in an increase in the sector area by a factor of 22 (four).
Arc length of a circle: The length of an arc is the distance between two points on a circle. The formula for the arc length of a circle is given:
Arc Length = (θ/360)2πr
where θ is the central angle in degrees,
r is the radius of the circle,
and 2pie is a constant value.
If we double the radius of a circle, the arc length also doubles.
This is because the arc length is directly proportional to the radius.
Hence, doubling the radius of a circle results in an increase in the arc length by a factor of 2.
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Tell whether the given value is a solution of the inequality.
q/5 < q-20; q=15
Answer:
No, q=15 is not a solution to the inequality.
Step-by-step explanation:
As given, q=15. So, substituting is the best way to solve this problem.
Step 1: Substitute
[tex]\frac{15}{5}=3[/tex]
[tex]15-20=-5[/tex]
Step 2: Substitute values into inequality
[tex]3 < -5[/tex]
Equation is false since 3 is a bigger value than -5.
Hope this helps ya!
if 80% of all marketing personnel are extroverted, then what is the probability that 10 or more are extroverts at a party of 15 marketing personnel
The probability that 10 or more of 15 marketing personnel are extroverts is 0.719.
Since 80% of all marketing personnel are extroverts, the probability of any single marketing personnel being an extrovert is 0.8. The probability that 10 or more marketing personnel at the party of 15 are extroverts can be calculated using the Binomial Distribution formula:
P(X>=10) = 1 - [P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4) + P(X=5) + P(X=6) + P(X=7) + P(X=8) + P(X=9)]
P(X>=10) = 1 - [15C0*0.80*0.215 + 15C1*0.81*0.214 + 15C2*0.82*0.213 + 15C3*0.83*0.212 + 15C4*0.84*0.211 + 15C5*0.85*0.210 + 15C6*0.86*0.29 + 15C7*0.87*0.28 + 15C8*0.88*0.27 + 15C9*0.89*0.26]
P(X>=10) = 0.719
Therefore, 0.79 is the probability that 10 or more of the 15 marketing personnel at the party are extroverts.
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eric from exercise 3.30 continues driving. after three years, he still has no traffic accidents. now, what is the conditional probability that he is a high-risk driver?
The conditional probability that Eric is a high-risk driver, given that he has had no traffic accidents in the past three years, is very low. Generally, insurance companies use the number of traffic violations and/or the number of claims a driver has had within a certain time period as indicators of their riskiness.
As Eric has had no accidents or traffic violations, the probability that he is a high-risk driver is very low. However, this does not mean that the probability is zero. There are many other factors which can contribute to a driver's risk, such as age, gender, experience, and location.
If Eric is an experienced driver, who has been driving for many years with no traffic accidents, then the probability of him being a high-risk driver will be lower than the average driver. On the other hand, if Eric is a new driver, or is located in an area with a high rate of traffic accidents, then the probability of him being a high-risk driver may be higher than the average driver.
Overall, the conditional probability that Eric is a high-risk driver, given that he has had no traffic accidents in the past three years, is very low. However, this probability can change depending on other factors, such as his age, experience, and location.
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1)
The Polynomial Remainder Theorem states that if P(x) is divided by x-a, then the
remainder is equal to P(a). Given: 2x³ + 5x²-12x+9+x-3. Look at the divisor and
determine the value for "a". Evaluate P(a) and find the remainder.
The value for a is 1 and the remainder when P(x) is divided by x - 1 is 2.
What is polynomial remainder theorem?
It states that the remainder of the division of a polynomial f(x) by a linear polynomial x-r is equal to f(r).
The divisor in this case is x - a, where "a" is the value we need to determine.
We can see that the given polynomial 2x³ + 5x² - 12x + 9 + x - 3 has a term of x in addition to the other terms. This means that the divisor must also have a term of x in it.
So, we can write the divisor as x - a and set x - a = 0 to solve for "a":
x - a = 0
=> x = a
Therefore, "a" must be equal to 1 since there is a term of x in the polynomial.
To find the remainder, we need to evaluate P(a) where P(x) = 2x³ + 5x² - 12x + 9 + x - 3 and a = 1.
P(a) = 2(1)³ + 5(1)² - 12(1) + 9 + (1) - 3 = 2 + 5 - 12 + 9 + 1 - 3 = 2
So, the remainder when P(x) is divided by x - 1 is 2.
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in a sample of men, said that they had less leisure time today than they had years ago. in a sample of women, women said that they had less leisure time today than they had years ago. at , is there a difference in the proportions? use for the proportion of men with less leisure time
The test static for sample of 50 men, 44 said that they had less leisure time today than they had 10 years ago is 0.2377.
A number derived from a statistical test of a hypothesis is the test statistic. It displays how closely your actual data fit the distribution predicted by the statistical test's null hypothesis.
In order to determine whether to accept or reject your null hypothesis, the test statistic is utilised to calculate the p value of your findings.
In a sample of 50 men, 44 said that they had less leisure time today than they had 10 years ago.
In a sample of 50 women, 48 women said that they had less leisure time than they
had 10 years ago.
p-hat men:: 44/50 = 0.22
p-hat women:: 48/50 = 0.24
Test Stat:
z(0.24-0.22) =[tex]\frac{0.02}{\sqrt{[(0.22*0.78/50)+(0.24*0.76/50)]} }[/tex] = 0.2377
At [tex]\alpha[/tex] = .05, is there a difference in the proportions between the men and women
[tex]p-value = 2*P(z > 0.2377) = 0.8121[/tex]
Since the p-value is greater than 5%, fail to reject H.
H: p(men)-p(women) = 0
Ha: p(men)-p(women) # 0 = .05, is there a difference in the proportions between the men and women
p-value = 2*P(z > 0.2377) = 0.8121
Since the p-value is greater than 5%, fail to reject H.
H: p(men)-p(women) = 0
Ha: p(men)-p(women) # 0
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Complete question:
In a sample of 50 men, 44 said that they had less leisure time today than they had 10 years ago. In a sample of 50 women, 48 women said that they had less leisure time than they had 10 years ago. What is the test statistic? At [tex]\alpha[/tex] = .05, is there a difference in the proportions between the men and women?
which numbers will round to 19 when they are rounded to the nearest whole number? select each correct answer. responses 19.46 19.46 18.48 18.48 19.91 19.91 18.82 18.82 19.33 19.33 1, fully attempted. 2, fully attempted. 3, fully attempted. 4, fully attempted. 5, fully attempted. 6, fully attempted. 7, unattempted. 8, unattempted.
The numbers that will round to 19 when rounded to the nearest whole number are 19.46 and 19.91.
To round a number to the nearest whole number, we look at the decimal part of the number. If it is less than 0.5, we round down to the nearest integer. If it is greater than or equal to 0.5, we round up to the nearest integer.
For the given set of numbers, we can round them to the nearest whole number and check which ones round to 19:
19.46 rounds up to 19
18.48 rounds down to 18
19.91 rounds up to 20
18.82 rounds up to 19
19.33 rounds up to 19
Therefore, the numbers that round to 19 when rounded to the nearest whole number are 19.46 and 19.33.
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PLSSSS HELP IF YOU TURLY KNOW THISS
Given:-
[tex] \tt \: x - 5 = 2[/tex][tex] \: [/tex]
Solution:-
[tex] \tt \: x - 5 = 2[/tex][tex] \: [/tex]
[tex] \tt \: x = 2 + 5[/tex][tex] \: [/tex]
[tex] \boxed{ \tt{ \blue{ \: \: x = 7 \: \: }}}[/tex][tex] \: [/tex]
The value of x is 7 !
__________________
hope it helps ⸙
use the properties of geometric series to find the sum of the series. for what values of the variable does the series converge to this sum?
7−14z+28z2−56z3+⋯
sum =
domain =
(Give your domain as an interval or comma separated list of intervals; for example, to enter the region x<−1 and 2
a) The sum of the given series is 7 / (1 + 2z)
b) The domain of convergence is (-∞, -1/2) U (1/2, ∞).
The given series can be expressed as
7 – 14z + 28z^2 - 56z^3 + ...
This is a geometric series with first term (a) = 7 and common ratio (r) = -2z. The formula for the sum of an infinite geometric series is
sum = a / (1 - r)
Substituting the values of a and r, we get
sum = 7 / (1 + 2z)
So, the sum of the given series is 7 / (1 + 2z).
For the series to converge, the absolute value of the common ratio must be less than 1. That is,
|r| = |−2z| < 1
Simplifying this inequality, we get
1/2 < |z|
So, the domain of convergence of the given series is (-∞, -1/2) U (1/2, ∞).
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Can you solve this with workings out please
Answer:
Eighty biscuits.
Step-by-step explanation:
We need to find the limiting factor. We can do that by comparing ratio of mass of ingredient given to mass of ingredient needed for 20 biscuits
[tex]Butter:\\800:150\\=16:3\\=5.33\\Sugar:\\700:75=28:3\\=9.33\\Flour:\\1000:180\\=50:9\\=5.56\\Chocolate Chips:200:50\\=4:1\\=4\\[/tex]
We can clearly see that the choco. chips are the limiting factor since it has the lowest ratio, basically meaning we will run out of choco chips before anything else.
[tex]Biscuits=4*20=80[/tex]
Since we only have 4 times the choco chips needed to make 20 biscuits, we can only make 80 biscuits. Now you can see, we have other ingredients left, but choco chips have ran out which is why it was the limiting factor.
[tex]Flour:\\1000-4(180) = 280g[/tex]
After making 4 servings we still have 280g of flour left.
Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers.
Subtract the following polynomials, then place the answer in the proper location on the grid. Write your answer in descending powers of x.
Subtract 2x2 - 6x - 4
from 4x2 - 4x + 3.
The answer to subtracting the two polynomials is 2x2 - 10x - 7. The process of subtracting polynomials is like that of subtracting any other type of numerical expression.
What are polynomials?Polynomials are mathematical expressions consisting of variables, coefficients, and exponents. They are used to represent a variety of functions, such as polynomial equations, rational equations, and trigonometric functions.
In this case, our like terms are 2x2 and 4x2, and -6x and -4x, and -4 and +3. We begin by subtracting the coefficients of the like terms. We subtract the coefficient of the term with the highest power first. In this case, that is 2x2 and 4x2, we subtract 2 from 4 to get 2. Next, we subtract the coefficients of the terms with the second highest power. This is -6x and -4x, so we subtract -6 from -4 to get -2. Thus, our answer now reads 2x2 -2x.
Finally, we subtract the coefficients of the terms with the lowest power. This is -4 and +3, so we subtract -4 from 3 to get -7. Thus, our answer now reads 2x2 -2x -7.
This answer can then be placed in the proper position on the grid.
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a professor at a local university noted that the exam grades of her students were normally distributed with a mean of 68 and a standard deviation of 17. according to the professor's grading scheme only the top 12.3 percent of her students receive grades of a. what is the minimum score needed to receive a grade of a? write your answer to two decimal points.
A minimum score of 88.95 is required to receive an "A" grade on the exam.
To determine the minimum score required to receive an "A" grade on an exam, we must first understand the meaning of standard deviation and mean. The mean is the average of a set of values, whereas the standard deviation is a measure of how far apart the values are from the mean. The minimum score required to receive an "A" grade is determined by calculating the z-score that corresponds to the top 12.3 percent of exam scores.
The formula for calculating the z-score is given as: z = (x - μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. Solving for z, we have: z = invNorm(1 - 0.123) = invNorm(0.877) ≈ 1.15. The inverse normal distribution function is used to determine the value of z that corresponds to the area to the right of the z-score. We can then use the formula for the z-score to solve for the raw score (x):
x = zσ + μ
Substituting the values we have, we get:
x = 1.15(17) + 68 ≈ 88.95
Therefore, a minimum score of 88.95 is required to receive an "A" grade in the exam.
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Exercise 3-23A (Algo) Using ratio analysis to assess financial risk LO 3-5
The following information was drawn from the balance sheets of two companies. Company Assets = Liabilities + Equity
East 206,000 91,000 115,000
West 603,000 169,000 434,000
Required
a. Compute the debt-to-assets ratio to measure the level of financial risk of both companies. B. Compare the two ratios computed in requirement a to identify which company has the higher level of financial risk
The answer based on debt to assets ratio for east and west company are,
East company debt to assets ratio is equal to 0.44.
West company debt to assets ratio is equal to 0.28.
After comparing both the company debt to assets ratio East company is at higher level of financial risk.
Assets = Liabilities + Equity
For East company,
206,000 = 91,000 + 115,000
Assets = 206,000
liabilities = 91,000
Equity = 115,000
For West company,
603,000 = 169,000 + 434,000
Assets = 603,000
liabilities = 169,000
Equity = 434,000
Debt-to-assets ratio = Total liabilities divided by the total assets.
Debt-to-assets ratio for East
= 91,000 / 206,000
= 0.44
Debt-to-assets ratio for West
= 169,000 / 603,000
= 0.28
Comparing the two ratios,
0.44 > 0.28
This implies,
Company East has a higher debt-to-assets ratio is greater than the compared to Company West.
This represents that Company East has a higher level of financial risk.
As larger proportion of their assets are financed through debt.
This shows it is difficult to repay if the company experiences financial difficulties.
Company West has a lower level of financial risk as smaller proportion of their assets are financed through debt.
Therefore, the answer of the following questions are,
Debt to asset ratio of east company = 0.44
Debt to asset ratio of west company = 0.28
Company east has a higher financial risk level .
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E
ON YOUR OWN
Surface Area 2
3.04 On Your Own: Surface Area 2
Now It's Time to Practice on Your Own
m²
Two cubes are placed together to form a solid so that one of side of the first cube completely matches up with one side of the second cube. Each cube has a side length of 5 m.
What is the total surface area of the solid?
Enter your answer in the box.
250 is the total surface area of the solid.
How do you determine surface area?
The whole surface of a three-dimensional form is referred to as its surface area. The surface area of a cuboid with six rectangular faces may be calculated by adding the areas of each face.
Instead, you may write out the cuboid's length, width, and height and apply the formula surface area (SA)=2lw+2lh+2hw.
Each side of a cube with side length = 5 has an area of 25; the overall area is 6 x 25 = 150
A cube with sides of length 5 has an area of 25 on each side, making its overall area 6 x 25 or 150.
Both have a combined area of 150 + 150 = 300
300 - 25 - 25 = 250 is the result from each of the two cubes.
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Answer this for points
Julie works Sunday,
, and Wednesday for 10 hours each day. On Tuesday, Thursday, and Friday, she works 7 hours each day. She does not work on Saturday. Her weekly total earnings are $612
Julie hourly rate of pay from the given different rates of the day with total earning of $612 is equal to $12per hour.
Total number of hours Julie works in a week is equal to,
On Sunday = 10 hours
On Monday = 10 hours
On Tuesday = 7 hours
On Wednesday = 10 hours
On Thursday = 7 hours
On Friday = 7 hours
On Saturday = 0 hours
Total hours worked in whole week is
= 10 + 10 + 7 + 10 + 7 + 7 + 0
= 51 hours
Total money earned by Julie in whole week = $612
Hourly rate of pay = Weekly earnings / Total hours worked
Substitute the value we have,
⇒ Hourly rate of pay = $612 / 51 hours
⇒ Hourly rate of pay = $12 per hour
Therefore, Julie's hourly rate of pay is $12 per hour.
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The above question is incomplete , the complete question is:
Julie works Sunday, Monday, and Wednesday for 10 hours each day. On Tuesday, Thursday, and Friday, she works 7 hours each day. She does not work on Saturday. Her weekly total earnings are $612. What is Julie's hourly rate of pay, in dollars?