Answer:
= -0.4
Step-by-step explanation:
3d-4 when d=1.2
3(1.2) - 4
3.6 - 4
= -0.4
Answer: 0.4
Step-by-step explanation:
Equation: 3d - 4
1. Substitute the variable with the given number (d = 1.2)
3(1.2) - 4
2. Solve 3 × 1.2
3.6 - 4
3. Solve
3.6 - 4 = -0.4
What two ways could you describe the shape pattern below?
ΔΟΔΟΔΟ
Answer:
The pattern is a repeated triangle and circle.
So, the next shape would be a triangle and a circle.
Step-by-step explanation:
Solve the system of quadratic equations, explain each step if possible:
The solutions to the system of equations formed by the linear equation 9 · x + 9 · y - 79 = 0 and the quadratic equation x² + 5 · x - y - 4 = 0 are (x₁, y₁) = (5 / 3, 64 / 9) and (x₂, y₂) = (- 23 / 3, 148 / 9).
How to solve a system of equations
Herein we find a system of equations formed by a linear equation and a quadratic equation. This system must be resolved by means of algebra properties. First, write the system of equations:
9 · x + 9 · y - 79 = 0
x² + 5 · x - y - 4 = 0
Second, clear the variable y in the first equation:
9 · x + 9 · y - 79 = 0
9 · y = 79 - 9 · x
y = 79 / 9 - x
Third, substitute y on the second equation:
x² + 5 · x - (79 / 9 - x) - 4 = 0
x² + 6 · x - 115 / 9 = 0
Fourth, use the quadratic equation to find the solutions of x:
x₁ = 5 / 3, x₂ = - 23 / 3
Fifth, calculate the solutions of y:
y₁ = 79 / 9 - x₁
y₁ = 64 / 9
y₂ = 79 / 9 - x₂
y₂ = 148 / 9
The solutions are (x₁, y₁) = (5 / 3, 64 / 9) and (x₂, y₂) = (- 23 / 3, 148 / 9).
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5. Gary has walked 5 miles
already and continues
walking at a pace of 2
miles per hour. Write an
expression to represent
how many miles he has
walked.
Answer:210 miles
Step-by-step explanation:Gary walking in opposite directions will calculate how long it takes for him to be a given distance apart.
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Answer:
17.3
Step-by-step explanation:
Four scenarios of statistical studies are given below. Decide which study uses a sample statistic.
Based on the four scenarios of statistical studies given, a study which uses a sample statistic is: D. As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election, 39 said yes.
What is a sample statistic?In Mathematics and Statistics, a sample statistic can be defined as a small piece of statistical information that is obtained by a researcher or scientist from the sample of a population.
This ultimately implies that, a sample statistic simply refers to any numerical quantity (figure) or data that is generated from the sample of a population by a researcher or scientist.
In this context, we can reasonably infer and logically deduce that 84 of Kaisa's classmates represent the sample of the total population while the 39 classmates who answered yes represent the sample statistic.
In conclusion, the statistical study that was conducted by Kaisa is a study that represent the sample statistic.
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Complete Question:
Four scenarios of statistical studies are given below. Decide which study uses a population parameter.
The average finish time for the Ironman, Kona was 11:32 for the 1883 finishers, with an average swim time of 1:14, an average bike time time of 4:14.
Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity.
Of 351 dog owners who were surveyed, 70 reported owning two dogs.
As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election, 39 said yes.
what property is illustrated below
-5x + 2 =2 -5x
Answer:
distributive property
What is the rate of change of the function?
Enter your answer as a number, like this: 42
Answer:
-2
Step-by-step explanation:
1. Identify two points with integer (not fraction or decimal) coordinates:
Ex: (0,5) and (3,-1)
2. subtract the y-coordinates: -1-5 = -6
and the x- coordinates (IN THE SAME ORDER): 3-0 = 3
3. divide the difference in y (-6) by the difference in x (3): -6/3 = -2
PLEASE HELP ME I NEED IT ASAP!!
Given the inequality 4x ≤ 28, which of the following is a solution that makes the inequality true?
For the inequality 4x ≤ 28 the solution that makes the inequality true will be x≤7.
What is inequality?It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than known as inequality.
It is given that the inequality is 4x ≤ 28.
Now that the equation has been simplified, we obtain both sides of the inequality equation, divide by 4, and we obtain
x ≤ 7
As a result, x must be less than or equal to 7.
The requirement for x is satisfied by any numbers that are less than or equal to 7.
Thus, for the inequality 4x ≤ 28 the solution that makes the inequality true will be x≤7.
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Answer:
a
Step-by-step explanation:
7
F and H are sets of real numbers defined as follows.
F = { v l v < 4}
H = { v l v ≥ 7}
Write F ∩ H and F ∩ H using interval notation. If the set is empty, write ∅.
The final interval notation is F ∩ H = [7, 4] & F ∪ H = [-∞, ∞].
What is the interval notation?
A set of real numbers known as an interval in mathematics contains all real numbers falling inside any two of the set's numbers. For instance, the interval containing 0, 1, and all integers in between is the set of values x satisfying 0 x 1.
We have,
F and H are sets of real numbers defined as follows.
F = { v l v < 4}
H = { v l v ≥ 7}
F is the set of all real numbers that are less than or equal to 4. H is the set of real numbers greater than 7.
F U H is the union (or combination) of the two sets, so it is the set of all real numbers that are less than equal to 3 or greater than 6:
F ∩ H is the set of real numbers that are in both sets; but since F is less than or equal to 4 and H is greater than 7, there are no numbers that are in both sets. Hence the answer is the empty set, Ø:
F ∩ H = Ø
F ∩ H = [7, 4]
F ∪ H = [-∞, ∞]
Hence, the final interval notation is F ∩ H = [7, 4] & F ∪ H = [-∞, ∞].
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Solve the equation without using a calculator
[tex]\bf\\x^{x^2-2x+1}=2x+1[/tex]
The value of the variable x in the equation xˣ²⁻²ˣ⁺¹ = 2x + 1 is 1 + √2
Exponential EquationsAn equation is a mathematical statement that shows that two mathematical expressions are equal.
An equation combines two expressions connected by an equal sign. These two expressions on either side of the equals sign are called the “left-hand side” and “right-hand side” of the equation. We generally assume the right-hand side of an equation is zero.
Basically, an equation is a statement that equate or says two expressions are equal to one another.
The problem given may be assumed as an exponential equation
xˣ²⁻²ˣ⁺¹ = 2x + 1
Solving for x by isolating the variable;
x = 1 + √2
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Answer:
x = 1 ±√2
Step-by-step explanation:
You want to solve the exponential equation ...
x^(x² -2x +1) = 2x +1
without using a calculator.
GuessThere are no algebraic methods for solving such an equation.
We can solve quadratic equations, so we can guess that the exponent of x is 2:
x² -2x +1 = 2
x² -2x -1 = 0
Using 2 as an exponent, the given equation becomes ...
x² = 2x +1 . . . . . . . exponent on the left is 2
x² -2x -1 = 0
That is, the exponent being 2 is consistent with the requirements on x.
QuadraticThe solution to the quadratic can be found using the quadratic formula:
x² -2x -1 = 0
x = (-(-2) ±√((-2)² -4(1)(-1))/(2(1)) = (2±2√2)/2
x = 1±√2
Either of these values will make the exponent of x be 2, so both are solutions to the equation. The negative solution is not found by the graphing calculator (attached).
here is the image of triangle ABC and its dilation using Center D and scale factor 2. Why is B'C' on the same line as its corresponing side segment BC
Since only the lengths increase by scale factor, B'C' on the same line as its corresponding side segment BC .
What is the Dilation?
Math definition of dilation Resizing an object is accomplished through a change called dilation. The objects can be enlarged or shrunk via dilation. A shape identical to the source image is created by this transformation. The size of the form does, however, differ.
The following are the properties of dilation of the triangle:
1)measures of the angles will not change
2)The sides of the image of the triangle are multiplied by the scale factor 2.
So,
A'B'=2AB
B'C'=2BC
A'C'=2AC
Since only the lengths increase by scale factor, B'C' on the same line as its corresponding side segment BC .
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What is the probability that a point chosen at random in the triangle is also in the blue square?
Answer:
[tex]\dfrac{1}{3}[/tex]
Step-by-step explanation:
Divide the area of the square by the area of the triangle.
[tex]\dfrac{A_{\textrm{square}}}{A_{\textrm{triangle}}} = \dfrac{3^2}{(9\times 6)\div 2}[/tex]
And simplify.
[tex]= \dfrac{9}{54 \div 2}[/tex]
[tex]= \dfrac{9}{27}[/tex]
[tex]=\dfrac{1}{3}[/tex]
sorority has 35 members, 25 of whom are full members and 10 are pledges. Two persons are selected at random from the membership list of the sorority. Find the requested probabilities The second person selected is a pledge if the first person selected was a full member.
(a) The probability that the first person selected is a pledge is; 10/35
(b) The probability that the first person selected is not a pledge is; 25/35
(c) The probability that the second person selected is a pledge if the first person selected was also a pledge is; 9/34
How to find the probability of selection?We are given;
Total number of members in the Sorority = 35
Number of full members = 25
Number of members that are pledges = 10
Formula for probability is;
Probability = Number of Favorable Outcomes / Total Number of Outcomes.
1) Probability that the first person selected is a pledge = number of pledges/total number of members = 10/35
2) Probability that the first person selected is not a pledge = 1 - (Probability that the first person selected is a pledge)
= 1 - 10/35 = 25/35
3) If the first person selected was also a pledge, then for the second pledge, one pledge is out, so we have 9 pledges in 34 people.
P = number of pledges / total = 9/34
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Complete question is;
A sorority has 35 members, 25 of whom are full members and 10 are pledges. Two persons are selected at random from the membership list of the sorority. Find the requested probabilities. (Enter the probabilities as fractions.)
(a) The first person selected is a pledge.
(b) The first person selected is not a pledge.
(c) The second person selected is a pledge if the first person selected was also a pledge.
If cos of Ф = 2/5, find sin Ф/2 and cos Ф/2. Assume the angles are in the 1st quartile
a. The trigonometric ratio sin(Ф/2) = +√(3/10)
b. The trigonometric ratio cos(Ф/2) = +√(7/10)
What are trigonometric ratio?Trigonometric ratios are the ratios of the sides of a right-angled triangle. They include
sinФ, cosФ, tanФ etcwhere Ф is the angle between the sides
a. How to find the trigonometric ratio sin(Ф/2)?Given that cosФ = 2/5, we use the trigonometric identity
cosФ = 1 - 2sin²(Ф/2)
Making sin(Ф/2) subject of the formula, we have
sin(Ф/2) = ±√(1 - cosФ)/2
So, susbstituting the value of cosФ = 2/5 into the equation, we have
sin(Ф/2) = ±√(1 - cosФ)/2
sin(Ф/2) = ±√(1 - 2/5)/2
sin(Ф/2) = ±√[(5 - 2)/5]/2
sin(Ф/2) = ±√(3/[5 × 2])
sin(Ф/2) = ±√(3/10)
Since Ф is in the first quartile, sin(Ф/2) = +√(3/10)
b. How to find the trigonometric ratio sin(Ф/2)?Given that cosФ = 2/5, we use the trigonometric identity
cosФ = 2coss²(Ф/2) - 1
Making sin(Ф/2) subject of the formula, we have
coss(Ф/2) = ±√(1 + cosФ)/2
So, susbstituting the value of cosФ = 2/5 into the equation, we have
coss(Ф/2) = ±√(1 + cosФ)/2
cos(Ф/2) = ±√(1 + 2/5)/2
cos(Ф/2) = ±√[(5 + 2)/5]/2
cos(Ф/2) = ±√(7/[5 × 2])
cos(Ф/2) = ±√(7/10)
Since Ф is in the first quartile, cos(Ф/2) = +√(7/10)
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I really need help on this!
The common ratio of given geometric sequence is r = - (1/2)
What is geometric sequence?A geometric sequence is a set of integers that follows a pattern where each term is multiplied by a fixed number called the common ratio, or r, to find the following term.
solution:
a3 = - (3/8)
a8 = 3/256
common ratio = a3 / a8
= - (3/8) / 3/256
common ratio = - (1/32)
a8/a3 = (ar^7) / (ar^2)
= r^5
r^5 = - (1/32)
r = - (1/2)
Hence the common ratio of given geometric sequence is r = - (1/2)
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A bicyclist travels the first 800 m of a trip 1.4 minutes, the next 500 m in 1.6 minutes, and finishes up the final 1200 m in 2 minutes.
What is the total distance traveled on the bicycle?
______ meters
What is the total time the bike traveled?
_______ minutes
Find the average speed (in meters/min) of the bicyclist for this trip. _______ meters
The total distance traveled on the bicycle is 2500m
The total time the bike traveled is 19.4 minutes.
The average speed (in meters/min) of the bicyclist for this trip is 128.9 m/minutes.
What is speed?Speed is the rate at which an object's location changes in a particular direction. The distance traveled on relation changes to a particular direction. The distance in relation to the time it took to travel the distance is the speed.
The total distance traveled on the bicycle will be:
= 800 + 500 + 1200
= 2500m
The total time the bike traveled will be:
= 1.4 + 16 + 2
= 19.4 minutes
Speed = Distance / Time
= 2500 / 19.4
= 128.9 meters per minute
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A rental car agency charges $160 per week plus $0.25 per mile to
rent a car. How many miles can you travel in one week for $335?
The number of miles travelled by the family in one week is 700 miles
How to determine the number of miles travelledFrom the question, we have the following parameters that can be used in our computation:
Charges per week = $160
Charges per mile = $0.25
Total charges = $335
The above parameters mean that
Total charges = Charges per week + Charges per mile x Number of miles
Substitute the known values in the above equation, so, we have the following representation
160 + 0.25 * Number of miles = 335
This gives
0.25 * Number of miles = 175
Multiply both sides by 4
Number of miles = 700
Hence, the number of miles is 700
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A coordinator will select 7 songs from a list of 11 songs to compose an event's musical entertainment lineup. How many different lineups are possible?
Answer:
Step-by-step explanation:
= 604800
I need your help please with this problem of math.
(14+8²)÷2-10
Answer: 29
Step-by-step explanation: your welcome
2x^2 – 4x + 3 = 0 Solve using the quadratic formula
Please help i tried twice im so confused, nobody has the answer.
Answer: d = -8
Step-by-step explanation: look at the attached link
What is the solution to the equation?
1/2n+3=6
n = 18
n = 9
n = 6
n=3/2
start by plugging them in to thr problem
How do you simplify the square ro
ot of 180 and how do you know that it is in simplest form?
Step-by-step explanation:
[tex] \sqrt{180 } = 6 \sqrt{5} [/tex]
because 6² = 36 and 36×5 = 180
I don't think there's any simple way to do it
(LOTS OF POINTS)
4. (Multiple Choice) In the figure shown, which of the following is the greatest?
A. a
B. b
C. c
D. d
E: e
Answer:
The answer is e
Step-by-step explanation:
.Ansel wants to borrow $10,000 from the Hampton County Bank. They offered him a 6-year loan with an APR of 6.35 %. How much will he pay in interest over the life of the loan ?
Ansel has to pay an interest of $167.4 per months for the the life of the loan to the Hampton County Bank.
Explain the term APR?That yearly interest amount you'll spend if you have a balance off your credit card is referred to as the annual percentage rate (APR). Some credit cards feature variable APRs, which means that over time, your rate may go up or down. Your annual percentage rate, which is determined by the particulars of your loan and includes the interest rate as well as additional costs like borrower and mortgages broker fees, is often greater than your interest rate.The formula for the monthly installments are-
M = P(r/12)(1 + r)∧12t / (1 + r)∧12t - 1
Put the values;
Principal P =$10,000.
Rate of interest r = 6.35%
Time t = 6 years 72 months
M = 10,000(0.0635/12)(1 + 0.0635)∧72 / (1 + 0.0635)∧72 - 1
M = $167.4
Thus, Ansel has to pay an interest of $167.4 per month for the the life of the loan to Hampton County Bank.
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Answer:
The quickest answer is to take the number 72 and divide it by the rate of interest. In this case, it would take approximately 72/6, or 12 years to double.
Step-by-step explanation:
Levi invested $8,500 in an
account paying an interest rate of 3.4%
compounded continuously. Assuming no deposits or withdrawals are
made, how much money, to the nearest ten dollars, would be in the
account after 18 years?
The amount of money after 18 years when the interest is compounded continuously is $15725.
What is compound interest?The process of calculating interest and reinvesting it in an account's balance over an infinite number of periods is known as continuous compounding.
Given that Levi invested $8,500 in an account paying an interest rate of 3.4% compounded continuously. Assuming no deposits or withdrawals are made, how much money, to the nearest ten dollars?
The compound interest will be calculated as
[tex]P(t) = P_oe^{rt}[/tex]
[tex]P(t) = 8500\times e^{0.034\times 18}[/tex]
P(t) = 8500 x 1.85
P(t) = $15725
Therefore, the amount of money after 18 years when the interest is compounded continuously is $15725.
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Answer:15670
Step-by-step explanation:
pythagorean theorem number search activity
Step-by-step explanation:
1). Red
x² = 98² - 44² = 9604 - 1936 = 7668
x =√7668 = 6√213
2) orange
X² = 31²+30² = 1861
x = √1861
What is the r2 value for the following data to three decimal places?
0.783 0.278 0.611 0.885
Answer:
0.783
Step-by-step explanation: got it right :)
Avery earned a score of 310 on Exam A that had a mean of 350 and a standard deviation of 20. She is about to take Exam B that has a mean of 550 and a standard deviation of 40. How well must Avery score on Exam B in order to do equivalently well as she did on Exam A? Assume that scores on each exam are normally disturbed.
The score that Avery must get on Exam B is given as follows:
470.
What is the z-score formula?The z-score of a measure X of a variable that has mean symbolized by [tex]\mu[/tex] and standard deviation symbolized by [tex]\sigma[/tex] is obtained by the rule presented as follows:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score represents how many standard deviations the measure X is above or below the mean of the distribution, depending if the obtained z-score is positive or negative.
For exam A, the mean and the standard deviation are given as follows:
[tex]\mu = 350, \sigma = 20[/tex]
She scored 310, hence the z-score of her grade is given as follows:
Z = (310 - 350)/20
Z = -2.
For exam B, the mean and the standard deviation are given as follows:
[tex]\mu = 550, \sigma = 40[/tex]
To do as well as on exam A, she needs a z-score of -2, hence the grade X is obtained as follows:
-2 = (X - 550)/40
X - 550 = -80
X = 470.
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y = 3x + 2
y = 2x + 2
One solution
No solution
Infinite solutions
Answer:
The answer would be One solution.
Step-by-step explanation:
Solving by substitution.y=3x+2;y=2x+2
Step: Solve y=3x+2 for y:
y=3x+2
Step: Substitute 3x+2 for y in y=2x+2:
y=2x+2
3x+2=2x+2
3x+2+−2x=2x+2+−2x(Add -2x to both sides)
x+2=2
x+2+−2=2+−2(Add -2 to both sides)
x=0
Step: Substitute 0 for x in y=3x+2:
y=3x+2
y=(3)(0)+2
y=2(Simplify both sides of the equation)
Answer:
x=0 and y=2
If it was no solution you would not be able to solve. If it was infinite then there would be infinite solutions, but there is not so One Solution is the answer.