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3 years ago

Help me answer this question please (use full working)

Mathematics

1 answer:

guapka [62]3 years ago

4 0

Step-by-step explanation:

The above variation is written as

y = kx²

where k is the constant of variation

when y = 20 and x = 1

we have

20 = k(1)²

k = 20

So the formula for the variation is

y = 20x²

when x is doubled that's x = 2

y = 20(2)²

y = 20(4)

when y = 80

We have

80 = 20x

Divide both sides by 20

Hope this helps you

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<u>Answer:</u>

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<u>Step-by-step explanation:</u>

$x^2 + 12$

First set the equation to 0

$x^2 + 12$

$x^2 + 12 = 0$

Second, get the 12 on the right side of the equal sign by adding a -12 to each side

$x^2 + 12 = 0$

$x^2 + 12 + (-12) = 0 -12$

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Square root both sides of the equal sign.

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Take the square root on left sides of the equal sign.

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3 years ago

Help me answer this question please (use full working)​

Help me answer this question please (use full working)