An item costs $320 before tax, and the sales tax is $22.40
Find the sales tax rate. Write your answer as a percentage.

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

How far could you drive on 50 gallons of gas

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5