Is a linear function a function?

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

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Factor the expression using gcf 9b+45