Marquis has 7 cups of yogurt. He gives his sister 3 3/5 cups of the yogurt, how much of Marquis's yogurt remains?

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

Triangle xyz has vertices x(1,3), y(0,0)

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?