What are dimensions of rectangle with 420in^2?

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%

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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