Please assist me with this​

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

In the diagram of circle o, what is the measure of zabc?

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.