Solve 3! that's literally 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.

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16