15 points me : ) which equation represents a proportional relationship? y=−2/x y= 32x y = 4x + 3 y=2(x+1)

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y