Express the relation(3, 5), (4, 6), (3, 8), (2, 4), (1, 3), as a mapping. Then determine the domain and range​

Solve for x i'll try to attach the files bc it's not letting me for some reason

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 solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)