exam Maths Puzzle Numerical Ability

How do I find the maximum height of a baseball which is hit with an upward velocity of 90 feet per second when the initial height of the ball was 3 feet?

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exam Other Question

I need help factoring this:

x^2-2xy+y^2-a^2-2ab-b^2

Thanks for your help and time. Which of the following equations is an example of a direct variation?
y = 4x
x = -4
x -2y = 7
y = 5/x

Please show all work

Thank you