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zloy xaker [14]
3 years ago
15

Jodi has two bank accounts. Her parents started Account A for her. It currently has $100 in it, and Jodi deposits $20 into it ea

ch month. Jodi's grandparents started Account B for her. It ccurently has $300 in it, and her grandparents deposit $40 into it each month.
Account A is modeled by the function f(x)=20x+100
and Account B is modeled by the function g(x)=40x+300
, where x
represent the number of months from now.

Write a new function (f+g)(x)
that represents the total amount of money Jodi has in both accounts. Simplify your answer.
Mathematics
1 answer:
marin [14]3 years ago
4 0

Answer: 60x+400

Step-by-step explanation:

Given

Account A can be modeled by f(x)=20x+100 and

Account B can be modeled by g(x)=40x+300

So, the function that represents the total amount of money Jodi has can be modeled by

\Rightarrow (f+g)(x)=20x+100+40x+300\\\Rightarrow (f+g)(x)=60x+400

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If f(x) is the inverse of g(x) then if f(a)=b then g(b)=a

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