Answer:[tex]T(n)=126.5n+50[/tex]
Explanation: We are adding two linear functions: A the original function describing Abdul's deposits, and B the deposits made by his wife.
[tex]A(n) = 50.85n+50\\B(n)=75.65n\\T(n)=A(n)+B(n) = 50.85n+50 + 75.65n= (50.85+ 75.65)n+50=126.5n+50\\T(n)=126.5n+50[/tex]
The resulting function is a larger slope due to the added deposit rate.