Ive been trying so hard to figure this out someone please help Find the precent of markup if the cost to the store is $250 and the store is selling the TV for $312.50

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

Which equation can be solved to find x the measure of jk in the apex