4. A salesperson at a jewelry store earns 3% commission each week. Last week Heidi sold $720 worth of jewelry.
a) How much did she make in commission?
b) How much did the jewelry store make from her sales?

What is the value of r of the geometric series?

Match each equation with the operation you can use to solve for the variable. subtract 10. divide by 10. divide by 5. subtract 18. multiply by 10. add 18. add 10. multiply by 5. 5 = 10p arrowright p + 10 = 18 arrowright p + 18 = 5 arrowright 5p = 10 arrowright

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left