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Butoxors [25]
3 years ago
8

SOMEONE HELP ME PLEASE

Mathematics
1 answer:
Studentka2010 [4]3 years ago
8 0

Answer:

y = 90

Step-by-step explanation:

A direct variation is

y = kx where k is a constant

30 = k(-3)  from the first set of points

30/-3 = -3k/-3

-10 = k

The equation is y = -10x

Let x = -0

y = -10 * -9

y = 90

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6 0
2 years ago
Why does (-4 1/2)^2 = 20.25? Thank you please hurry!
AnnZ [28]

Answer:

See below.

Step-by-step explanation:

Squaring a number means to multiply the number by itself.

For example, 3^2 means 3 * 3.

8^2 means 8 * 8.

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In each case above, you see that the number that is squared is multiplied by itself.

In this case, (-4.5)^2, squaring the number -4.5, means multiply the number -4.5 by the number -4.5

(-4.5)^2 = (-4.5) * (-4.5)

Now we need to actually multiply -4.5 by -4.5

When you multiply a negative number by a negative number, the result is positive, so the product of -4.5 and -4.5 is a positive number. To find that number, you multiply 4.5 by 4.5

4.5 * 4.5 = 20.25

Therefore, (-4.5)^2 = 20.25

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4 years ago
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