If ∆∆ ∆∆ QRS ≅ ∆∆ ∆∆ MNP , QR = 11, QS = 15, MP = 2 x + 1, m ∠ S = 84 ° , m ∠ R = 32 ° , and m ∠ M = (17 y – 4) ° , find the values of x and y .

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?

Novak gives 9 packs of paper to a group of 5 students. if the group shares the paper equally how many packs of paper does each student get. write the a answer as a mixed number

What 620000 divided by 10 to the third power