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3 years ago

PLEASE HELP FOR 48 POINTS PLEASE! show/explain your answer and work

Mathematics

2 answers:

Rasek [7]3 years ago

6 0

Answer:

Step-by-step explanation:

The equation you are looking for must look something like y = k*x

The easiest way to find it is to try 2 points to see if k would be equal in both cases. Do this for each choice.

y = kx
x = 5
y = 1
y = kx
1 = k*5
k = 1/5

y = kx
x = 7
y = 2
2 = k*7
k = 2/7

k is not the same in both case. A is not the answer.

==================

Using the steps above

x = 10
y = -6
k = -6/10 = - 0.6

x = 6
y = -3
k = - 3/6
k = -1/2

B is not the answer.

=====================

x = 3
y = 9
y = kx
9 = k*3
k = 9/3
k = 3

x = 6
y = 18
y = kx
18 = 6k
18/6 = 6/6 k
k = 3

C is the answer

====================

You can try D yourself

pentagon [3]3 years ago

4 0

Answer:

c This is the direct variation

Step-by-step explanation:

The equation for direct variation is y= kx

Solving this for k

y/x =k

So y/x must be a constant

a. 9/3 =3

2/7 does not =3 so this is not a direct variation

b 1/2 = .5

-3/6 = -.5

This is not the same so this is not a direct variation

c. 27/9 =3

18/6 =3

9/3 =3

This is a direct variation with a constant of 3

d 5/-7 = -5/7

1/-3 = -1/3

This is not the same so this is not a direct variation

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What is the arithmetic mean for the following numbers,88,80,75,70,38,45,70,60,60,50

Natalija [7]

Answer:

63.6

Step-by-step explanation:

X=£fx/n

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2 years ago

Describe the solution(s) to 9x² - 36x + 36 = 0 by just determining the radicand. Show your work. (10 points) Part B: Describe th

Mariana [72]

The solution to the equations are:

9x² - 36x + 36 = 0 has two equal real solutions
x² - x + 4 = 0 has no real solutions
The factored expression of 4x² + 23 – 35 is 4(x² -3)

<h3>Part A: Describe the solution</h3>

The equation is given as:

$9x\² - 36x + 36 = 0$

The above equation is a quadratic equation which can be represented as:

$ax\² + bx + c = 0$

The discriminant (d) is calculated as:

$d = b\² - 4ac$

So, we have:

$d = (-36)\² - 4 * 9 * 36$

$d = 0$

A discriminant of 0 means that the equation has two equal real solutions

Hence, 9x² - 36x + 36 = 0 has two equal real solutions

<h3>Part B: Describe the solution</h3>

The equation is given as:

$x\² - x + 4 = 0$

The above equation can be represented as:

$ax\² + bx + c = 0$

The discriminant (d) is calculated as:

$d = b\² - 4ac$

So, we have:

$d = (-1)\² - 4 * 1 * 4$

$d = -15$

A discriminant of -15 means that the equation has no real solutions

Hence, x² - x + 4 = 0 has no real solutions

<h3>Part C: The solution to the expression</h3>

We have:

$4x\² + 23 - 35$

Evaluate the difference

$4x\² -12$

Factor out 4

$4(x\² -3)$

Hence, the factored expression of 4x² + 23 – 35 is 4(x² -3)

Read more about quadratic expressions at:

brainly.com/question/10449635

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1 year ago

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katrin2010 [14]

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6 0

3 years ago

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Arisa [49]

You would multiply 16*3 to get an estimate.
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The bike would be about 48 units.
I'm assuming you mean a 16:1 scale.
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