Solve the pair of simultaneous equation 2x - y=5 ,x + y=4 and 2x +2y =20 ,2x -2y =80​

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

I’m confused on how to work the pie charts

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so