How do i find the answer to this problem?

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

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?