On a trip, Luke bought a ping-pong racket for $33. With the tax, he paid $36.30. What is the tax rate, in percent?

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?

Common binomial factor of 6x(3x+7)+5(3x+7)

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?