Hi! The answer seems to be incomplete; however, I will try my best to help.
For Jamie, the equation will be:
175 + 75(x)
For Tanner, the equation will be:
50 + 100(x)
I am assuming that whoever has the most money after the amount of years is the correct answer, but I do not know the years they do this to give you a complete answer.
Hope I helped!
* x is how many years she adds money