Your engineering firm in Tampa is subcontracting a job through a telecommunication company headquartered in Daytona Beach (175 miles away). You and your boss have scheduled to meet in person. You left your office later than planned. To meet on time, you have decided to increase your speed. Your average is 4 mph faster than your boss's time. You meet after 1.25 hours. Create a system of equations and determine your average speed.