Express 9+(-1)=8 in two more equations that have the same relationship in a different way

Select the correct answer and solve for y

Agrid shows the positions of a subway stop and your house. the subway stop is located at (-5,2) and your house is located at (-9,9). what is the distance, to the nearest unit, between your house and the subway stop?

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?