Evaluate the following expression. 6^-3

Find the slope of the line passing through a pair of points

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of