A nurse mixes 40 cc of 60% saline solution with a 30% solution to produce a 35% salone solution How much of the 30% solution should he use?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Which of the following expressions is equal to 2x^2+8

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?