Step-by-step explanation:
y = x² - 16
x² = y + 16
x = sqrt(y + 16) because x is non-negative.
Hence the inverse function is f^(-1)(x) = sqrt(x + 16). (A)
Answer:Plug it into demos and base your own graph off of the one that they give you.
Step-by-step explanation:
Here is the equation:

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You need to get "x" by itself so minus 3 from each side

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Divide 8 by 2

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x=4
So each 4 is equivalent to 4
Lets check:

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So that means that Marcus practiced the piano for 4 hours and Donnel practiced for 7