Aray is a defined term because it ?

A ray is a defined term because it has no width or depth is described using an undefined term has an informal definition travels forever in one way

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.