Question 994108
R - time for Rico to drive 88 miles
L - time for Luis to bike 88 miles
R can drive 2 times faster, which means he will get to the end in 1/2 the time
Now we have an equation:
R=1/2L
Also, it took Luis 2 hours longer than Rico:
R+2=L
Now, on this last equation let's substitute tha value of R:
1/2L+2= L Subtract 1/2L from both sides
2= 1/2L Now divido both sides by 1/2
4= L, or L= 4 So it takes Luis 4 hours to do the 88 miles. Finally: 
v= d/t= 88/4= 22 miles per hour is Luis' speed