Perpendicular lines ab and cd intersect at point e. if m zaed = x + 20, what is the value of x?

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

How do i simply this radical expression?

Examine this system of equations. what integer should the second equation be multiplied by so that when the two equations are added together, the x term is eliminated? 3/4x+1/7y=6 1/8x-3/5y=16