If x-2y=0 and 3x+y=7 whats the vaule of ×?

What is the product of the radical expression. (7-2square root) (8+2 square root)

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries