Answer:
Step-by-step explanation:
3n + 11 = 29
3n = 18
n = 6 (age of the triplets)
triplets 6 + 6 + 6 + 11 = 18 + 11 = 29 years altogether for the 4 kids total
70
81 miles
378/14=27
The unit rate is 27 miles per hour
27*3 = 81
