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Alanna can detail a car in 45 minutes. Robbie can detail a car in 30 minutes. If they work together, how many minutes does it take them to detail a car? (2 points) a 15 minutes b 18 minutes c 75 mi
Alanna can detail a car in 45 minutes. Robbie can detail a car in 30 minutes. If they work together, how many minutes does it take them to detail a car? (2 points)
a
15 minutes
b
18 minutes
c
75 minutes
d
90 minutes