A tower is 7m from a mirror on the ground. If Erica is 4m from the mirror and is 3.2m tall, What is the height of the tower?

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

What is negative 3/9 times negative 2/8 ?

6x + 3y = -6 2x + y = -2 a. x = 0, y = -2 b. infinite solutions c. x = -1, y = 0 d. no solution