Write the ratio in lowest terms in order to decide whether the proportion is true or false.
10/15=5/6

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.

Acylinder has volume 45π and radius 3. what is it’s height?

How do you use the elimination method for this question? explain, because i really want to understand!