exam Maths Puzzle Numerical Ability

I really need help with these questions.

Evaluate each function for x= -2,0,and 5.

1.) y = 9 + x

2.) y = x^2 - 1


Please help me because I need to get this to my teacher tommorrow.

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exam Other Question

A man has twenty coins consisting of dimes and quarters. If the dimes were quarters and the quarters were dimes, he would have ninety cents more than he has now. How many dimes and quarters does he have? i just need some help working one of these problems. if i am shown how to do it one time, i can get it after that