Need help with this question, unsure about the v represents part

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.