Astack of 6 books weighs 7.8 pounds. if each book weighs the same amount, how much doesn’t each book weigh?

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x

What else equals 42 and 30 for multiply

What is the measure of ac? enter your answer in the box. (4x - 5.5) (5x+25)