Question 729688
D=RT
245=X*3+(X-15)2
245=3X+2X-30
245+30=5X
275=5X
X=275/5
X=55 MPH FOR THE TURNPIKE TRIP.
55-15=40 MPH FOR THE SECONDARY ROAD TRIP.
PROOF;
245=3*55+40*2
245=165+80
245=245