Find the sum and express it in simplest form. (-5y^3-7y-7)+(7y^3+8y)

(hurry! ) which expression is equivalent to the following complex fraction?

Do 12/14 and 8/10 have the same value? explain your answer.

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%