Question

What is 7 im so confused

Answer 1

Answer:

7 weeks

Step-by-step explanation:

John saves  f(x) = 60+5x

Sarah saves g(x) =x^2 +46

They save the same amount of money

Set the equations equal

60+5x =x^2 +46

Subtract 60 from each side

60+5x -60 =x^2 +46-60

5x= x^2 - 14

Subtract 5x from each side

5x -5x= x^2-5x - 14

0 = x^2-5x - 14

Factor

0 = (x-7) (x+2)

Using the zero product property

x-7=0   x+2 =0

x=7  x=-2

Since we cannot have negative weeks

x=7