A pair of Nikes cost $89.99 and the sales tax is 8%. What is the total cost of the shoes including tax?

Based on what i know about mean, this doesn't add up.

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

Simplify the algebraic expression 8y-2(y+4)