An item cost $450 before tax and the sales tax is $13.50. Find the sales tax rate. Write your answer as a percentage.

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles

If you could answer these your a life saver

Bring the fraction a/a-4 to a denominator of 16-a^2