The consumers will demand 27 units when the price of a product is $43, and 42 units when the price is $27. Find the demand model (express the price in terms of the quantity ), assuming it is linear.

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