Christina went to the store and spent $6.91 for her science project. She gave the cashier $9.00. Estimate the amount of change the cashier should give Christina.

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

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.

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y