Question

The balance in two separate bank accounts grows each month at different rates. The growth rates for both accounts are represented by the functions f(x) = 2x and g(x) = 4x + 12. In what month is the f(x) balance greater than the g(x) balance?

Answer 1

can u help me @Shirley27

Answer 2

Here, it would be an inequality of 2x > 4x +12

Answer 3

so it would be 6

Answer 4

solving it would look something like this:

2x > 4x + 12
-2x > 12
x < -6

except that doesn't seem right...

Answer 5

why

Answer 6

you can't have negative months

Answer 7

these are the answers
0mnths
1mnths
2mnths
3mnths

Answer 8

and true

Answer 9

hello are u still there

Answer 10

hold on, i'm getting a graph

Answer 11

oh

Answer 12

so it would be 2

Answer 13

the red is 2x and the blue is 4x + 12, the place where the red is above the blue is in the negative

Answer 14

or 3

Answer 15

well, what does x represent? the month?

Answer 16

correct

Answer 17

is y the growth rate or the actual amount?

Answer 18

i think so?

Answer 19

If y was the growth rate and both accounts started at the same amount, then the answer should be 0?

Answer 20

oh i get where ur coming from

Answer 21

thank

Answer 22

its not 0

Answer 23

oh, then i'm afraid I can't help you :(

Answer 24

0h oh k

Answer 25

maybe it is not \[f(x)=2x\] could it be \[f(x)=2^x\]?

Answer 26

because for positive numbers \(2x\) is always less than \(4x+12\)