Cullen bought 7 screwdrivers at a cost of $1.20 each. He gave the cashier a ten dollar bill to pay for the screwdrivers. How much change did he receive?

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Use the discriminant to describe the roots of each equation. then select the best description. 2m2 + 3 = m double root real and rational roots real and irrational roots non-real roots