Hi can you help me with this question

Given f(x) = x − 7 and g(x) = x2 . find g(f( g(f(4))

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

If chord ab is congruent to chord cd, then what must be true about ef and eg?