use the centroid therom and the fogure for exercises 5-8 QU RS and PT are medians of PQR rs = 21 VT=5 find each length
Answers
The length of RV is 14, SV is 7, TP is 15 and VP is 10. The solution has been obtained using centroid theorem.
What is centroid theorem?
According to the centroid theorem, the centroid of a triangle is located at a distance of 2/3 between the vertex and the midpoint of the sides.
In the given figure, V is the centroid of the triangle
The medians RS and PT intersect at V.
Now, since V divides each median in the ratio 2:1, therefore,
⇒VT = 1/3 of PT
⇒PT = 3*VT
Since, VT=5
⇒PT = 15 = TP
So, VP = PT - VT
⇒VP = 15-5
⇒VP = 10
Similarly,
⇒RV = 2/3 of RS
Since, RS = 21, therefore,
⇒RV = 2/3 of 21
⇒RV = 14
So, SV = RS-RV
⇒SV = 23-14
⇒SV = 7
Hence, the length of RV is 14, SV is 7, TP is 15 and VP is 10.
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Related Questions
HELP WANTED TYY!!! Charlie has two different-sized vases for flowers. The dimensions of his small vase with a diameter of 6 cm are shown below.
A vase shaped like a cylinder is shown. A dashed line drawn across the bottom of the vase is labeled six centimeters. The height of the vase is labeled twenty-one centimeters.
His large vase has the same height as the small vase, but its diameter is 2 times greater. How do the volumes of Charlie’s two flower vases compare? Use 3.14 for π.
Select the answers from the drop-down lists to correctly complete each sentence.
The volume of his large vase is ________ = A) 2,373.84 B) 593.46 C) 791.28
D) 1582.56 cm^3.
This is _______ = A) 4 B) 2 C) 3
times the volume of his small vase.
Answers
The volume of his large vase is 2,373.84cm^3 (option A)
The is 4 times the volume of the small verse. (option A)
What is the volume of the large verse?A cylinder is a three-dimensional object. It is a prism with a circular base.
volume of a cylinder = nr^2h
Where:
π = 3.14r = radius = diameter / 2 h = heightRadius of the small verse = 6/2 = 3 cm
Volume of the small verse = 3.14 x 3² x 21 = 593.46 cm³
Radius of the large verse = (2 x 6) / 2 = 6cm
Volume of the large verse = 3.14 x 6² x 21 = 2,373.84 cm³
Difference in volumes = 2,373.84 cm³/ 593.46 cm³ = 4
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Solve the system of linear equations by elimination.
5x+6y=50
x-6y=-26
Answers
Answer:x=4, y=5
Step-by-step explanation:
evaluate the limit by first interpreting the sum as a riemann sum for a function defined on [0, 16].
Answers
The limit in question is
[tex]$$\lim_{n\to \infty} \frac{1^3 + 2^3 + 3^3 + \dots + n^3}{n^4}$$[/tex]
This limit can be interpreted as the Riemann sum of a function defined on the interval [0, 16]. To calculate the sum, we need to first find the function that is being approximated. To do this, we can use the fact that the numerator of the limit can be rewritten as a single summation:
[tex]$$\sum_{k=1}^n k^3 = \frac{n^2 (n+1)^2}{4}$$[/tex]
This means that the function we are approximating is [tex]$f(x) = \frac{x^2 (x+1)^2}{4}$[/tex]
Now, to calculate the Riemann sum, we need to divide the interval [0, 16] into $n$ equal subintervals. The width of each subinterval is given by [tex]$\Delta x = \frac{16}{n}$\\The Riemann sum is given by $$\sum_{i=1}^n f\left(x_i\right) \Delta x = \sum_{i=1}^n \frac{\left(x_i\right)^2 \left(x_i+1\right)^2}{4} \cdot \frac{16}{n}$$[/tex]
where [tex]$x_i = \frac{16i}{n}$[/tex]
Plugging this into the limit, we get
[tex]$$\lim_{n\to \infty} \frac{1^3 + 2^3 + 3^3 + \dots + n^3}{n^4}\\ = \lim_{n\to \infty} \frac{\sum_{i=1}^n \frac{\left(x_i\right)^2 \left(x_i+1\right)^2}{4} \cdot \frac{16}{n}}{n^4} = \\frac{16}{4} \lim_{n\to \infty} \frac{\sum_{i=1}^n \frac{\left(x_i\right)^2 \left(x_i+1\right)^2}{n}}{n^3}$$[/tex]
Finally, we can take the limit of the above expression to get
[tex]$$\lim_{n\to \infty} \frac{1^3 + 2^3 + 3^3 + \dots + n^3}{n^4} = \frac{16}{4} \cdot \frac{f(16)}{16^3} = \frac{1}{4}$$[/tex]
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A projectile is launched from ground level with an initial velocity of feet per second. Neglecting air resistance, its height in feet t seconds after launch is given by . Find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when 112 feet per second.
Answers
The time(s) that the projectile will (a) reach a height of 192 ft is 4 seconds and (b) return to the ground when is 8 seconds
What is time?Time is the continued sequence of existence and event that can occur in an apparently inevitable succession from the past through the present
The set height, s=192
(a) 192=-16t²+112t
-16t^2+112t-192=0
-t^2+8t-16=0
t^2-8t+16=0
(t-4)(t-4)=0
t=4 twice
The projectile will reach a height of 192ft after 4 sec on the way up and after 4 sec again on the way down
..
Also, set height, s=0
(b) -16t^2+128t=0
-t^2+8t=0
-t(t-8)=0
t=0 (reject)
or
t=8
The projectile will return to the ground after 8 sec
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Correct question:
A projectile is launched from the ground with an initial velocity of V0 feet per second. Neglecting air resistance, its height in feet per seconds after launch is given by s = -16t^2 +V0t. Find the time(s) that the projectile will
(a) reach a height of 192ft and
(b) return to the ground when V0= 112 feet per second.
volumes (cm)^3 of 20 brains have a mean of 1120.6cm^3 and a standard deviation of 124.5cm^3. use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. would a brain volume of 1389.6^3 be significantly high ? is 1389.6^3 significantly high? what are the significantly low values or lower and what are the significantly higher values.
Answers
The significantly low values are:
Lower than 871.6 cm³.
The significantly high values are:
Higher than 1369.6 cm³.
Hence a volume of 1389.6 cm³ is significantly high, as it is more than 2 standard deviations from the mean.
What is the range rule of thumb?The range rule of thumb states that measures that are more than two standard deviations from the mean in a data-set are considered unusual.
Considering the mean and the standard deviation for this problem, the bounds are given as follows:
Significantly low: Lower than 1120.6 - 2 x 124.5 = 871.6 cm³.Significantly high: Higher than 1120.6 + 2 x 124.5 = 1369.6 cm³.More can be learned about the range rule of thumb at brainly.com/question/15825971
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please please please help
Answers
Answer:
[tex]\underline{x\quad \:\:\:\:\:\:-8\quad\quad\;\;-6\quad\quad0\quad\quad\quad\;\; \;\;2}\\y\quad\quad\;\;\;\boxed{\dfrac{1}{3}}\quad\quad\quad \boxed{0} \quad\;\boxed{-1} \quad\quad \boxed{\dfrac{4}{3}}[/tex]
Step-by-step explanation:
The strategy is to substitute the value of each of the given x values into the equation
[tex]y = -\dfrac{x}{6} - 1[/tex]
and find the corresponding value for [tex]y[/tex]
[tex]x\quad\quad\quad\quad\quad\quad\quad\quad\quad y = -\dfrac{x}{6} - 1\\\line(1,0){180}\\\\[/tex]
[tex]-8\quad\quad\quad\quad\quad\quad\quad\quad\quad y = -\dfrac{-8}{6} - 1 = \bf{{\dfrac{1}{3}[/tex]
[tex]-6\quad\quad\quad\quad\quad\quad\quad\quad\quad y = -\dfrac{-6}{6}-1 = \bf{0}[/tex]
[tex]0\quad\quad\quad\quad\quad\quad\quad\quad\quad y = -\dfrac{0}{6}-1 = \bf{-1}[/tex]
[tex]2\quad\quad\quad\quad\quad\quad\quad\quad\quad y = -\dfrac{2}{6} -1 =\bf{-}\dfrac{4}{3}[/tex]
[tex]\line(1,0){180}\\\\[/tex][tex]\line(1,0){180}\\\\[/tex]
what is the largest power of 10 that is a factor of the following numbers, i.e., how many zeroes are at the end of the decimal representation? a. 50! b. 1000!
Answers
In 50! will have 12 leading zeroes so the power of 10 will be 12 And for 1000! will have 249 Zeroes so here the power of 10 will be 249.
We calculate the leading zeroes by knowing the numbers 2 And 5 So
This number must end with 249 zeroes since there are 249 fives (and more than 249 twos) in its prime factorization. Thus 10 249 is the highest power of 10 that divides 1000!
To see why we have 249 powers of five:
there are 200 numbers ≤ 1000 that are multiples of 5there are 40 numbers ≤ 1000 that are multiples of 5^2 = 25there are 8 numbers ≤ 1000 that are multiples of 5^3 = 125there is 1 number ≤ 1000 is a multiple of 5^4 = 625200 + 48 + 8 + 1 = 249
And also we can do this with a formula n−σp(n)/(p−1) where σp(n) is the sum of the digits of n written in base-p
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.
7 - (3 + 41) + 6i
-10 + (6 - 5i) - 9i
Solve with explanation pls
Answers
The simplified form of the first expression is -37 + 6i and the second expression is -16 - 14i.
What is the arithmetic operations?
Arithmetic operations are basic mathematical operations that can be performed on numbers, such as addition, subtraction, multiplication, and division.
The first expression is 7 - (3 + 41) + 6i. To simplify this expression, we need to first simplify the parentheses. Inside the parentheses, we have 3 + 41 = 44. So the expression becomes:
7 - 44 + 6i
Next, we can simplify the arithmetic operations by combining like terms:
7 - 44 + 6i = -37 + 6i
The second expression is -10 + (6 - 5i) - 9i. Similar to the first expression, we need to simplify the parentheses first. Inside the parentheses, we have 6 - 5i = 6 - 5i. So the expression becomes:
-10 + 6 - 5i - 9i
Next, we can simplify the arithmetic operations by combining like terms:
-10 + 6 - 5i - 9i = -16 - 14i
Hence, the simplified form of the first expression is -37 + 6i and the second expression is -16 - 14i.
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What is the domain of f(x) = 5x – 7?
{x | x > –7}
{x | x < –7}
{x | x > 0}
{x | x is a real number}
Answers
Answer:
{x | x is a real number}
Step-by-step explanation:
x can have any real number value.
x^5-5x^3+4x=0 solve the equation
Answers
Answer:
x
=
0
,
x
=
1
,
x
=
2
,
x
=
−
1
, and
x
=
−
2
Explanation:
Start off by factoring out an
x
as follows
x
(
x
4
−
5
x
2
+
4
)
=
0
We can factor
x
4
−
5
x
2
+
4
Doing so we have
x
(
x
2
−
4
)
(
x
2
−
1
)
=
0
So in order for this to be equal to zero
x
=
0
OR
x
2
−
4
=
0
OR
x
2
−
1
=
0
Well
x
=
0
x
2
=
4
x
=
±
√
4
=
±
2
x
2
=
1
x
=
±
√
1
=
±
1
Which set of numbers could be the side lengths that will form a triangle?
Answers
All u have to do is use the Traingle Inequality theorem, which states that the sum of two sides lenghts of a triangle is always greater than the third side. if this is true for all three combinations of added side lengths then you will have a triangle
Hope this helps :>
Answer:
3, 5, 7
Step-by-step explanation:
given 3 sides, for a triangle to be formed, then the sum of any 2 sides must be greater than the third side.
4 , 4 , 8
4 + 4 = 8 , not greater than 8, so does not form a triangle
1 , 2 , 3
1 + 2 = 3 , not greater than 3, so does not form a triangle
3 , 9 , 14
3 + 9 = 12 < 14 , so does not form a triangle
3 , 5 , 7
3 + 5 = 8 > 7
3 + 7 = 10 > 5
5 + 7 = 12 > 3
condition is satisfied , so will form a triangle
if log 5 a= 3, then log 5 (a^3) =
Answers
There a rule for logarithms:
[tex]\log_n(a^m) = m \cdot \log_n(a)[/tex]
So when you're working with [tex]\log_5(a^3)[/tex], we can use that rule to rewrite this as
[tex]\log_5(a^3) = 3 \cdot \log_5(a)[/tex]
And since the first part tells us (on paper) that [tex]\log_5(a) = 2[/tex], then we can say
[tex]\log_5(a^3) = 3 \cdot \log_5(a) = 3 \cdot 2 = 6[/tex]
Given the geometric sequence where a1 = 7 and the common ratio is 3, what is the domain for n?
All integers where n ≥ 1
All integers where n ≥ 0
All integers where n > 7
All integers
Answers
The domain for 'n' will be all integers where n ≥ 1. Then the correct option is A.
What is a geometric sequence?A series of non-zero integers where every term after the first is obtained by increasing the one before it by a constant, non-zero value known as the scale factor.
Let a₁ be the first term and r be the common ratio. Then the nth term of the geometric sequence is given as,
aₙ = a₁ · (r)ⁿ⁻¹
The geometric sequence where a₁ = 7 and the common ratio is 3. Then the formula is given as,
aₙ = 7 · (3)ⁿ⁻¹
In the geometric sequence, the value of the exponent should be greater than or equal to zero. Then we have
n - 1 ≥ 0
n ≥ 1
The domain for 'n' will be all integers where n ≥ 1. Then the correct option is A.
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i could really use some help please
Answers
Answer:
B 6
Step-by-step explanation:
Answer:
B. 6
Step-by-step explanation:
6 x -14 = 3x + 4
3x = 18
X = [tex]\frac{18}{3}[/tex] Which equals =
6
functions that aren't invertible can be made invertible by restricting their domains. for example, the function $x^2$ is invertible if we restrict $x$ to the interval $[0,\infty)$, or to any subset of that interval. in that case, the inverse function is $\sqrt x$. (we could also restrict $x^2$ to the domain $(-\infty,0]$, in which case the inverse function would be $-\sqrt{x}$.) similarly, by restricting the domain of the function $f(x).
Answers
When the domain of x is restricted, the function x2 becomes one-to-one, and the inverse function is x.
It is true that limiting a function's domain might cause it to become invertible. Because it is not one-to-one in the example, the function x2 is not invertible across its complete domain of real numbers (i.e., it assigns multiple outputs to some inputs). However, x2 becomes one-to-one and invertible when the domain of x is constrained to or any subset of that interval. The range of x2, which is, is used to define the inverse function in this situation, which is
The function x2 becomes one-to-one when the domain of x is constrained, and the inverse function is
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Points D, B, and E are collinear. Find the value of a so that points A, B, and C are
collinear.
Answers
Because x is 6, points A, B, and C are collinear.
What is intersecting lines?The intersection of two lines in Euclidean geometry can be the empty set, a point, or another line. Distinguishing these cases and locating the intersection have applications in computer graphics, motion planning, and collision detection, among others. The intersecting lines are two lines that share exactly one common point. The intersecting lines have a point in common. The point of intersection is the common point that exists on all intersecting lines. When two or more lines intersect in a plane, they are referred to as intersecting lines. The intersecting lines share a common point, which exists on all of them and is known as the point of intersection.
Here,
Since the opposite angle are equal in intersecting lines,
42=7x
x=6
The value of x is 6 so that points A, B, and C are collinear.
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I need the answer as soon as possible!
3x + 4y^2 ; x = -3 and y = 5
Thank You!
Answers
The value of the expression 3x + 4y² when x = -3 and y = 5 is 91.
What is the value of the given expression?Given the expression in the question;
3x + 4y²
x = -3y = 5To determine the value of the expression when x = -3 and y = 5, plug in x = -3 and y = 5 for every x and values in the expression and simplify.
3x + 4y²
3( -3 ) + 4( 5 )²
Simplify
Take the square of 5
3( -3 ) + 4( 25 )
Multiply 3 and -3
-9 + 4( 25 )
Multiply 4 and 25
-9 + 100
Add -9 and 100
91
Therefore, the value of the expression is 91.
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At a local pizza shop, the delivery person earns $2 for every pizza delivered, plus $70 per day. How many pizzas must the delivery person deliver to earn more than $100 in one day? Write an inequality to represent this situation.
Answers
70 + 2x > 100 is an inequality to represent this situation.
What is inequality?In mathematics, inequalities specify the connection between two non-equal numbers. Equal does not imply inequality. Typically, we use the "not equal sign ()" to indicate that two values are not equal. But several inequalities are utilized to compare the numbers, whether it is less than or higher than.
Given, At a local pizza shop, the delivery person earns $2 for every pizza delivered, plus $70 per day.
Let "x" be the number of pizzas he delivers
Thus, the Total money he earns by delivering pizza = 70 + 2x
To earn more than 100$ inequality represents
70 + 2x > 100
So,
2x > 30
x > 15
Therefore, to earn more than 100$ every day he needs to deliver at least 15 pizzas.
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Cathy saves 4/5 of the money she earns from her part-time job. How much does she save when she makes $140?
Answers
Step-by-step explanation:
Money she makes=$140
since she saves 4/5 of the money she earns that means that: 4/5×140 = $32
This means that she saves $32 out of $140 she makes or earn
which of the following is most likely to contribute to a statistically significant but clinically meaningless value
Answers
When an occurrence is so common that it shouldn't be the result of chance or external influences on the study, it is said to be "statistically significant."
Different clinical significance exists. It alludes to tangible results. It frequently refers to the actual impact of a medical problem (or medical treatment) on a patient's health. The effects of a medicine are clinically meaningful if they provide alleviation. A medical problem is also considered clinically significant if it affects a patient's quality of life or expected lifespan.
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Answer the following
Answers
It is the measure of the steepness of the line: C
Is the vertical change between any two points: B
if the pattern below contiunues which equation(s) is a recursive formula that reprsents the number of sequences in this sequence
Answers
The recursive formula that represents the number of sequences in this sequence is n(n-1)(n-2)/6, where n is the number of terms in the sequence.
This recursive formula is based on the pattern of the sequence. The sequence has three terms, a, b and c, and then three combinations of two terms, ab, ac and bc, and then one combination of all three terms, abc. This pattern of three terms, then three combinations of two terms, then one combination of all three terms continues as the sequence increases.
The recursive formula represents this pattern in a mathematical equation. The formula is n(n-1)(n-2)/6, where n is the number of terms in the sequence. This formula is derived from the fact that for each term there are two other terms that can combine with it to form a two-term combination, and one combination of all three terms. Therefore, for n terms, there are n(n-1)/2 two-term combinations and one combination of all three terms, for a total of n(n-1)(n-2)/6 sequences.
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The complete question is
if the pattern below contiunues which equation(s) is a recursive formula that reprsents the number of sequences in this sequence 5, 10, 20, 40.
Determine the slope of the linear relationship
Answers
The increase in the y-coordinatesis then calculated by dividing it by the change in the x-coordinates.
How can you determine a linear graph's slope?Locating Slope using a graphChoose two random spots on the line's graph (preferably with integer coordinates).Identify them as A and B. (in any order).The "rise" from A to B should be calculated. If necessary, when moving vertically from point A to point B.Determine the "run" distance from A to B.Apply the following equation: slope = rise/run.You need the coordinates for two points on a line in order to calculate its slope. The increase in the y-coordinates (also known as the slope) is then calculated by dividing it by the change in the x-coordinates (referred to as the run).-6 to 29-2 to 152 to 18 to -20To learn more about linear relationship refer to:
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Which expression is equivalent to 64x - 16?
O 16(4x + 1)
O-16 (4x - 1)
16(4x - 1)
- 16(4x + 1)
whoever answers first will be brainlyist
Answers
Show that the quadrilateral, formed by joining the mid-points of the sides of a square is also a square.
Answers
Since the mid-points of opposite sides of a square are equal, the quadrilateral formed will also be a square.
A four-sided polygon whose all sides are equal is a square. This means that the opposite sides of a square are equal in length and the opposite angles are also equal. Furthermore, the diagonals of a square bisect each other at their mid-points. Therefore, if the mid-points of opposite sides of a square are joined, a quadrilateral is formed. Since the opposite sides and angles are equal, the quadrilateral formed is also a square. To prove this, we can draw a line from the mid-point of one side of the square to the mid-point of the opposite side. We can then draw a line from the mid-point of the other side of the square to the mid-point of the opposite side. This will form a quadrilateral, and due to the equal sides and equal angles, it will be a square.
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at westville high school there are 315 seniors and 389 juniors. 65% of the seniors have parkign passes and 42% of teh juior have parking passes. the statistics teacher selects a srs of 30 seniors and a seperate srs of 30 juniors.
Answers
a. The shape of the sampling distribution is normal by the Central Limit Theorem.
b. The mean is 0.23.
c. The standard error is 0.125, which means that the sample proportions differ by around 0.125 from the mean of 0.23.
d. The probability is 0.2877 = 28.77%.
By the Central Limit Theorem, each sample has at least 10 successes and at least 10 failures, and the shape of the distribution is normal.
For each sample, the mean and the standard error are specified as follows:
Seniors : [tex]p_{s} = 0.65, s_{s} =\sqrt{\frac{0.65(0.35)}{30} } = 0.087[/tex]Juniors : [tex]p_{j}= 0.42, s_{j} =\sqrt{\frac{0.42(0.58)}{30} } = 0.09[/tex]Hence, the distribution of differences, the mean, and the standard error are specified as follows:
Mean= 0.65 - 0.42 = 0.23.Standard error: [tex]s =\sqrt{0.087^{2}+0.09^{2} } = 0.125[/tex]Using the z-score formula, the probability that the difference is greater than 30 is 1 subtracted by the p-value of Z when X = 0.3, Therefore:
Z = (0.3 - 0.23)/0.125
Z = 0.56
Z = 0.56
1 - 0.7123 = 0.2877 = 28.77%.
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The complete question is:
At Westville High School there are 315 seniors and 389 juniors. 65% of the seniors have parking passes and 42% of the juniors have parking passes. The statistics teacher selects an SRS of 30 seniors and a separate SRS of 30 juniors. Let ^ps-^pj be the difference in the sample proportion of seniors and juniors that have parking passes.
a. What is the shape of the sampling distribution of ^ps-^pj? Why?
b. Find the mean of the sampling distribution.
c. Calculate and interpret the standard deviation of the sampling distribution.
d. What is the probability that the difference in sample proportions (senior-junior) of students with parking passes is greater than 30%?
50 POINTS REWARD + BRAINLEST!! NEEDED ASAP!! PLEASE!!
15. The algebraic expression 25x - 1,500 can be used to describe the daily profit of a company that makes waffle irons.
A. What does the first term of the expression represent? What does the second term of the expression represent?
B. Explain what the algebraic expression represents if the company sells 350 waffle irons per day.
C. What is the company's profit for a 5-day week? Explain.
Answers
A). The first term represents the total cost of the waffle irons and the second term represents the expenses.
B). The algebraic expression represents if the company sells 350 waffle irons per day will be 350x - 1500
C). The company's profit for a 5-day week is $250.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given that the algebraic expression 25x - 1,500 can be used to describe the daily profit of a company that makes waffle irons.
A). The first term represents the total cost of the waffle irons and the second term represents the expenses. Here 25 is the number of the waffle iron and the x is the number of days.
B). The algebraic expression represents if the company sells 350 waffle irons per day will be written as:-
350x - 1500
C). The company's profit for a 5-day week will be;-
Profit = 350x - 1500
Profit = ( 350 x 5 ) + 1500
Profit = 1750 - 1500
Profit = 250
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Function Tables
Thank you!
Answers
The complete function tables are written above.
What is a function? What is a quadratic function?A function describes a relationship between a dependent and independent variable. Example -
y = f(x) = 5x + 9
A quadratic function is of the form -
f(x) = ax² + bx + c
Given are the function tables as shown in the image attached.
{ 4 } -
Rule : h = 8c
{c} 2 3 4 5 6 7
{h} 16 24 32 45 48 56
{5} -
Rule : k = 2r
{r} 6 7 8 9 12 11 14
{k} 12 14 16 18 24 22 28
{6} -
Rule : k = 2r
{r} 6 7 8 9 12 11 14
{k} 12 14 16 18 24 22 28
Therefore, the complete function tables are written above.
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An airplane travels 4466 kilometers against the wind in 7 hours and 5866 kilometers with the wind in the same amount of time. What is the rate of the plane in still air and what is the rate of the wind? Note that the ALEKS graphing calculator can be used to make computations easier. Rate of the plane in still air: Rate of the wind: km h km h 010 S
Answers
The Rate of plane in still air and rate of wind is 738 , 100 respectively .
What is Linear equation ?
Linear equation can be defined as the equation in which the highest degree is one
Given ,
An airplane travels 4466 kilometers against the wind in 7 hours and 5866 kilometers with the wind in the same amount of time.
Let speed of plane be Vp and Va
Now,
Vp - Va = 4466 / 7
Vp+Va = 5866 / 7
So, Evaluating the equations,
we get,
2Vp = (4466+5866) / 7
Vp = 1476 / 2
Vp = 738
So substitute Vp =738 in Vp-Va = 4466/7
738 - Va = 638
Va = 738 - 638
Va = 100.
Hence, The Rate of plane in still air and rate of wind is 738 , 100 respectively .
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MAKING FAIR DECISIONS
2. A group of 6 students are in the school chess club. Their teacher has 2 tickets to a chess tournament She wants to make sure she has a fair way of deciding which 2 students will win the tickets. She decides that every time a student wins a chess match, that student's name will be put in a hat for a chance to win the tickets. She will choose two names from the hat at the end of the week
Part A: Is the teacher's method fair? Explain. If it is not fair, explain how you would change her method to make it fair. (5 points: 1 point for correctly deciding whether the method is fair or unfair, 4 points for the explanation and, if it is unfair, for a correction to the method)
Part B: Two new students join the chess club. The teacher wants to include them in the chance to win the tickets. How can she set up a fair way to make the decision that includes everyone? Explain why this method is fair (5 points)
Answers
Part A: The teacher's method is partially fair.
Part B: She can set up a fair way to make the decision that includes everyone by making it an open tournament for all such that all can participate.
How can she make the decision to be fair?Part A: The teacher's method is fair in terms of giving all students an equal opportunity to win the tickets by playing chess matches and having their names put into the hat.
However, it does not take into account the skill level of the students, which could result in a less skilled student winning the tickets over a more skilled student. To make the method more fair, the teacher could use a combination of wins and chess ratings to determine which students have the best chance to win the tickets.
Part B: To include the new students in the chance to win the tickets, the teacher could have them play chess matches against the current club members and use a combination of wins and chess ratings to determine the two students who will win the tickets.
This method is fair because it gives all students, including the new ones, the opportunity to compete and be recognized for their chess skills, rather than simply giving the tickets to the two students who have been in the club the longest. Additionally, using a combination of wins and ratings ensures that the most skilled players have a better chance of winning the tickets.
Therefore, the correct answer is as given above
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