math (algerbra)
posted by Erin W!!!!!! .
A bricklayer's assistant starts building a wall, laying 50 bricks per hour. Two hours later the master comes and lays down 80 bricks per hour.
x= number of hours since the assistant has been laying.
Qusestion
Write expressions for the number of bricks the assistant has laid and the number of bricks tha the master has laid.
Please help me.
I understand this stuff, but this problem is just stumpiing me!!!

<<Write expressions for the number of bricks the assistant has laid and the number of bricks that the master has laid.>>
Assistant: N1 = 50 x
Master: N2 = 80 (x2) (x>2)