Cost 45, markup 40 what’s the selling price

Is the ordered pair (-10, 7) a solution to the equation y = 17 – x? yes or no

Find the sum of the given arithmetic series. 24 + 17 + 10 + 3 + + (–39)

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work