What is the range of the function f(x) = 4x + 9, given the domain d = {-4,-2,0.2}?
a. r = {1, 7, 9, 17}
b. r=(-17, -9,-1, 17}
c. r = {-7, 1, 9, 17}
d. r = {-7,-1, 9, 17)

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?