PLS HELP IM IN THE MIDDLE OF A TEST PLS AND GIVE ME THE RIGHT ANSWER PLS.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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