Which expression is equivalent t to 2x+3y-x-(8+1)?

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap