Martha estimated there were 90 marbles in a jar for a contest. the actual number of marbles in the jar was 112. what was the percent error of martha's estimation?

What is the range for 31,39,29,34,37,24,36,33,34,28

Is the square root of 4 plus the square root of 16 rational?

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125