The difference of a number q and 7

The product of two negative rational numbers is always zero sometimes zero never zero

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

David must install fencing around a lot that is shaped like a right angle. the side of lot that runs east-west is 200 ft long. the side of the lot runs north-south is 125 ft long. calculate how many feet of fencing he will need to surround the entire lot.