AC=x+21, AB=22+2x, BC=8, find AC

Quadrilateral wxyz is on a coordinate plane. segment yz is on the line x+y=7 and segment xw is on the line x+y=3. which statement proves how segments yz and xw are related

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25