Find the value of a and b when x =10

What expression is equivalent to 42x-56y

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42