Answer:
1,if Noah is 15 his cousin is 8 or 96 months
2, and when Noah's cousin is 132 months or 11 years old Noah will be 18
3,n-[[7]12]=age of Noah's cousin
Step-by-step explanation:
1,15-7=8
1 part 2, 8*12=96
2,132/12=11
2 part 2,
11+7=18
3,n-[[7]12]=age of Noah's cousin
4,n+[7/12]
if n=18
18+[7/12]
or
18+0.5833=18.5833
The inverse is f^-1(x) = 2/7 + x/7
Depending what your solving X for what type of equation because it has different rules
Not 100% sure this is correct but this seems correct.