Kim drives 30 miles to her friend's house.  On the way back she has to take a detour that is 20% longer.  She spends 30 minutes at her friend's house.  She drives at a speed of 44 mph.  How long did she spend away from home?
The trip back was 30*.2=<T>multiply(30, 0.2)=6.0 miles longer than the trip there.
So it was 30+6=<T>add(30, 6)=36 miles.
So the total drive was 30+36=<T>add(30, 36)=66 miles.
That means she drove for 66/44=<T>divide(66, 44)=1.5 hours.
She stayed with her friend 30/60=<T>divide(30, 60)=0.5 hours.
So the total time was 1.5+.5=<T>add(1.5, 0.5)=2.0 hours.
