Can someone answer this math problem and show your working

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

If you could answer these your a life saver

Pls what is the relative minimum of the function? enter your answer in the box