Find all real square roots of -9

Andrea went to the store to buy sweater that was on sale for 40% off the original price it was then put on clearance an additional 25% off the sale price she also use a coupon that saved her an additional five dollars and j did not spend more than $7.60 for the sweater what are the possible values for the original price of the sweater?

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

How far could you drive on 50 gallons of gas