Solve for a 7a + 2a + a − 9a = 20

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2