Lines that form right angles at the point where they cross

Simply 8x squared + 5(7x squared- x) - 2x =

Bill works as a waiter and is keeping track of the tips he ears daily. about how much does bill have to earn in tips on sunday if he wants to average $22 a day? tips by day tips (dollars) monday tuesday wednesday thursday friday saturday $14 $22 $28 $36

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.