Joel mows his aunt's lawn for $9 per hour. If he spends $7 on gas, how many hours, x, will he need to spend mowing the lawn to have $47 left?

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent