Help on this question!!!!!!

Answer:

The value of y when x has a value of 9 is 18

Step-by-step explanation:

Functions

The variables x and y are said to have a quadratic relationship. That information is not enough to set up a general equation for both variables.

Furthermore, we know that tripling the value of x causes the value of y to be multiplied by 9. That leads us to establish a proportional equation between them, as follows:

[tex]y=kx^2[/tex]

Where k is an unknown constant.

Let's use the given point (3,2) to find the value of k:

[tex]2=k(3)^2[/tex]

[tex]2=9k[/tex]

Solving for k:

[tex]\displaystyle k=\frac{2}{9}[/tex]

The equation is now:

[tex]\displaystyle y=\frac{2}{9}x^2[/tex]

Now find y when x=9:

[tex]\displaystyle y=\frac{2}{9}(9)^2[/tex]

[tex]\displaystyle y=\frac{2}{9}\cdot 81=18[/tex]

The value of y when x has a value of 9 is 18

Answer:

18 cm/s means 18 cm in 1 second. When converting 18 cm/s into meters per minute, you need to convert 18 cm into meters and 1 second into minute. 18 cm = 18/100 meters. 1 second = 1/60 minutes.

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

A graph is only a function when there is only one y value for each x value.

A trick is to draw a line through some points on the x-axis, and if the line goes through more than one point. Then it is not a function. (See picture)

Sorry, not all the lines are straight, but you get the point. B is the only one that doesn't have more than one point on the lines I drew.

Answer:

I think you need to add more information but this is my guess. It takes (blank) time to travel 8.42 miles

Step-by-step explanation:

Answer:

[tex]-\frac{6}{5}x +2[/tex]

Step-by-step explanation:

Point slope form is as so:

[tex]y=mx+b[/tex]

Where m is the slope and b is the y-intercept

Just plug in the information you have in their respective spots of the equation

Answer:

Kindly check explanation

Step-by-step explanation:

Given that:

Mean score (m) = 80

Standard deviation = 4

Acore within one standard deviation of the mean:

Zscore = ± 1

Using the relation:

Zscore = (x - mean) / standard deviation

Where x = score

±1 = (x - 80) / 4

4 = x - 80

±4 + 80 = x

x = - 4 + 80 = 76

x = 4 + 80 = 84

Scire with 1 standard deviation of the mean :

76 = 1 standard deviation below

84 = 1 standard deviation above

Step-by-step explanation:

h=2

I cannot use the drawing tools. But, i can explain it to you.

Make a point where it can be at 7 and 4.

Basically, put a point 4 or 5 blocks right of the 7.

Next, put a point where it can be at 21 and 12.

Basically, put a point 11 or 12 block right of the 21.

Answer: You will plot (0,0) which is the beginning, then plot (4,7), then if you multiply 7 times 2 you get 14 flowers. With those 14 flowers you will put them on (8,14) 8 minutes 14 flowers, lastly you will put 12 minutes and 21 flowers down which will be (12,21). since there are 21 flowers and 12 minutes.

Step-by-step explanation:

Answer:intend (something) to occur or be the case.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Mean is an essential concept in mathematics and statistics. The mean is the average or the most common value in a collection of numbers.

How to calculate mean?

There are different ways of measuring the central tendency of a set of values. There are multiple ways to calculate the mean.

Arithmetic mean is the total of the sum of all values in a collection of numbers divided by the number of numbers in a collection. It is calculated in the following way:

The angles are complementary.

This means they add to 90 degrees.

(2x + 1) + (x + 5) = 90.

3x + 6 = 90. (Combine like terms)

3x = 84. (Subtract 6 from each side)

x = 28. (Divide 3 from each side)

x = 28

D is correct

Answer:

40.375

Step-by-step explanation:

I hope this helps

Answer: $3.17

Step-by-step explanation:

18.99/6=3.165

Answer:

3.165

Step-by-step explanation:

All you had to do was divide 18.99 and 6

I cannot use the drawing tools. But, i can explain it to you.

Make a point where it can be at 7 and 4.

Basically, put a point 4 or 5 blocks right of the 7.

Next, put a point where it can be at 21 and 12.

Basically, put a point 11 or 12 block right of the 21.

Answer:

You will plot (0,0) which is the beginning, then plot (4,7), then if you multiply 7 times 2 you get 14 flowers. With those 14 flowers you will put them on (8,14) 8 minutes 14 flowers, lastly you will put 12 minutes and 21 flowers down which will be (12,21). since there are 21 flowers and 12 minutes.

Step-by-step explanation:

Answer:

a) 0.5 is the probability of students who selected the stated option.

b) =0.8 is the probability of students who choose the stated option.

c) E(x) = P(x) x n

        = [(5) + (8)]x 1/10

       = 13/10

Step-by-step explanation:

Solution:

Number of students assigned to guilty state = 57

Number of students choose stated option = 45

Randomly Selected students =10

a) Find p(x=5)

x is the number in a sample of 10, who choose the stated option.

Sample number p(s) = 10

P(x) = 5

Probability = p(x) / p(s)

                  = 5/ 10

                   =0.5

0.5 is the probability of students who selected the stated option.

(b) Find p(x=8)?

Sample number p(s) = 10

P(x) = 8

Probability = p(x) / p(s)

                  = 8/ 10

                   =0.8 is the probability of students who choose the stated option.

(c) Expected (mean) value of x?

The expected value can be calculated by multiplying the probability of an event by the event's amount of times.

E(x) = P(x) x n

        = [(5) + (8)]x 1/10

       = 13/10

Answer:

y = - x + 6

Step-by-step explanation:

[tex] point \: slope: y - y_{1} = m(x - x_{1})[/tex]

as y is the y coordinate of the final point , y1 is the y coordinate of the initial point, m is the slope or gradient of the line, x is the x coordinate of the final point, and x1 is the x coordinate of the initial point.

given (-1,7) and (2,4). 7 = y1, 4 = y, -1 = x1, 2 = x.

when substituted into the equation the unknown variable is the slope which we are solving for.

y-y1=m(x-x1) ; y = 4, y1 = 7, x = 2, x1 = -1

(given)

4-7 = m(2--1)

(substitution property of equality)

-3 = m(2--1)

(subtraction property of equality)

-3 = m(3)

(subtraction property of equality)

-3 = 3m

(multiplication property)

-1 = m.

(division property of equality)

m = -1

(symmetric property of equality)

_____________________________

once m is solved you just need the initial values to solve for the actual equation.

y - y1 = m (x - x1) ; y1 = 7, m = -1, x1 = -1

(given)

y - 7 = -1 (x - -1)

(substitution property of equality)

y - 7 = -1 (x + 1)

(subtraction property if equality)

y - 7 = -x - 1

(distributive property of equality)

y = -x - 1 + 7

(addition property of equality)

y = -x + 6

(addition property of equality)

Answer:

get from (4,1) to (2,9) go up 8 and over 2 left (-2) - (4 - 2, 1 + 8), do this again (2 - 2, 9+8) and end up at (0,17) which is the y how do you change 7x+3y=3 into slope intercept form.

fjnjerng ertekjrtker terkjtkert ertkjrenktmermt erktnkermter

Answer:

2 inches

Step-by-step explanation:

liz's fish is 8 inches longer than ann's and her fish is 10 inches long 10-8=2

Answer:

[tex]x\neq 1+2n,n\in\mathbb{Z}[/tex]

Step-by-step explanation:

Remember that for the tangent parent function, it has infinite discontinuities (vertical asymptotes) on:

[tex]f(x)=\tan(x), \\\text{Where }x\neq\frac{\pi}{2}+n\pi, n\in\mathbb{Z}[/tex]

Here, we have:

[tex]f(x)=\tan(\frac{\pi x}{2})[/tex]

So, we can set the expression inside the tangent to equal our parent domain restriction. This yields:

[tex]\frac{\pi x}{2}\neq\frac{\pi}{2}+n\pi[/tex]

Solve for x. Multiply both sides by 2:

[tex]\pi x\neq \pi+2n\pi[/tex]

Divide both sides by π:

[tex]x\neq 1+2n, n\in\mathbb{Z}[/tex]

Therefore, for the function [tex]f(x)=\tan(\frac{\pi x}{2})[/tex], it is not continuous for all Xs [tex]1+2n[/tex] where [tex]n\in\mathbb{Z}[/tex]

Answer:

I think it will be 3....?

Answer:

mean 5

median 4

mode 3

Step-by-step explanation:

The mean is the average, or add up all the numbers and divide by the number of numbers

(3+5+2+4+3+4+3+5+16)/9

45/9 = 5

The median is the middle number when listed from smallest to largest

2,3,3,3,4,4,5,5,16

Since there are 9 numbers, the middle is the 5th number

2,3,3,3   ,4,     4,5,5,16

The median is 4

The mode is the number that appears most often which is 3 since it appears 3 times

Answer:

{0,π/3,π,5π/3}

Answer:

D

Step-by-step explanation:

on edge

Answer:

21

Step-by-step explanation:

84% = 84/100

= 0.84

multiply 25 by 0.84 for result

0.84 x 25 = 21

Answer:

y=3-2x

Step-by-step explanation:

Can i get brainliest please?

Answer:

D,C,B

Step-by-step explanation:

i hope this help you out if it does comment brainly

Step-by-step explanation:

x² + (y − 1)² = 9

This is a circle with center (0, 1) and radius 3.  We can parameterize it using sine and cosine.

Use the starting point to determine which should be sine and which should be cosine.

Use the direction to determine the signs.

Use the number of revolutions and the interval to determine coefficient of t.

(A) Once around clockwise, starting at (3, 1).  0 ≤ t ≤ 2π.

The particle starts at (3, 1), which is 0 radians on a unit circle.  It makes 1 revolution (2π radians).  Therefore:

x = 3 cos t

y = 1 − 3 sin t

(B) Two times around counterclockwise, starting at (3, 1).  0 ≤ t ≤ 4π.

The particle starts at (3, 1), which is 0 radians on a unit circle.  It makes 2 revolutions (4π radians).  Therefore:

x = 3 cos t

y = 1 + 3 sin t

(C) Halfway around counterclockwise, starting at (0, 4). 0 ≤ t ≤ π.

The particle starts at (0, 4), which is π/2 radians on a unit circle.  It makes 1/2 revolution (π radians).  Therefore:

x = -3 sin t

y = 1 + 3 cos t

Answer:

55 grams

Step-by-step explanation:

33 times 20 is 660. then you divide 660 by 12 which gives you 55.

There are 55 grams of sugar in a 20-ounce bottle of soda.

A unitary method is a mathematical way of obtaining the value of a single unit and then deriving any no. of given units by multiplying it with the single unit.

Suppose 4 pens cost $20, hence cost of 1 pen is (20/4) = $5.

From this unitary cost, we can determine the cost of any no. of pens.

Given that 12 ounces of cola contain 33 grams of sugar.

∴ 1 ounce of cola contains (33/12) = 2.75 grams of sugar.

Hence in a 20-ounce bottle, there will be (2.75×20) = 55 grams of sugar.

learn more about unitary method here :

https://brainly.com/question/22056199

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Answer:

Step-by-step explanation:

density is mass divided by volume, so 25g divided by 10 cm = 2.5 g

Answer:

60%

Step-by-step explanation:

12/20 or 6/10 or 3/5 simplified would be 60% of her students passed their test.

Answer:

The answer is 60%

Step-by-step explanation:

You have to convert the fraction 12/20. You divide this 12/20 which gives you 0.6. Then multiply 0.6 times 100.