John starts out at $10 in his savings account and his grandparents add $10 a week . write a recursive formula to represent how much money john has any time after two weeks

Step-by-step explanation:

Given that John starts out at $10 in his savings account and his grandparents add $10 a week

Initial deposit by John = 10$

Weekly addition by grand parents of John =10$

Thus initially the account would have 10, I week, 20, second week 30 and so on.

10,20,30,........will be the growth

If no of weeks elapsed is w, then balance would be

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13