-4y+x-(-x) please anyone help me please please

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

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