All of last year's car models were marked down 40%. Tracy wants to buy a car that now costs $18,000. What was the retail price of the car?

Asphere has a diameter of 10 in. what is the volume of the sphere?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

Given the sequence 7, 14, 28, 56, which expression shown would give the tenth term? a. 7^10 b. 7·2^10 c. 7·2^9