Answer:
6 years
their average age now is 15
so, in six years the average age will be 21
Step-by-step explanation:
If im wrong you have my regrets
31. A
32.A
33.B
34.C
A = 22.62
Remember law of tan
tan = opposite/adjacent
tan (A) = 5/12
A= tan inverse ( 5/12)