Sam paid 640 for a camera at a 20% off sell how much did it cost before the 20% off

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?