What are three ways in which people use microwaves

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

What is the area of triangle abc if a = 8, b = 11, and c = 15?