What is the sum of 4.9x10^2 and 6.8x10^3

Is it true or false i’m trying to pass this test so i can leave school

Which value would be a solution for x in the inequality 47-4x< 7

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