Simplify to create an equivalent expression

-y minus -3(-3y+5)

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

Which math sentence can be used to determine if the triangle is a right triangle?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2