At a yard sale you find 5 paperback books by your favorite author. each book is $0.75. write a rule for the amount (in dollars) you spend as a function of the number of books you buy.

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?