What is the first quartile value of 16 18 20 14 17 27 33 9 12

Carl wants to buy a television that cost $500 including taxes. to pay for television he will use a payment plan that requires him to make a down payment of $125 and then pay $70.50 each month for six months what is the percent increase from the original cast of the television to the cost of the television using a payment plan.

After two years, how much has been paid into interest?

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?