The area of a rectangle is 36 square centimeters and it's length is 9 centimeters whats the width

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21