Kelly’s scores for the last seven quizzes are 92,77,83,80,97,88, and 78 what is her mean quiz score

3.4a=57.8 what is the the value of a

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 is the scale factor of two similar pyramids with volumes of 64 cubic feet and 8 cubic feet