Find (f −1)'(a).
f(x) = 9 + x2 + tan(x/2), −1 < x < 1, a = 9

You and a friend went to the movies. you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

How do you determine if an ordered pair is a solution to a given equation?