Solve the system of equations by graphing.
x+y=7
2x-4y=8

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.

What is the y-intercept of the line given by the equation

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*