Mike bought an mp3 player for $150. the sales-tax rate was 8 percent. how much sales tax did he pay on the mp3 player? $1.20 $12 $138 $162

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

Solve for x where 0 equation: cot^2x+2cotx+1=0