Can someone me with this and answer asap

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

2x minus y equals 6, x plus y equals negative 3