Answer:
C. The functions have the same y-intercept
Step-by-step explanation:
In slope intercept form, y = mx + b, b represents the y-intercept, and in the first function the y-intercept is 10.
The y-intercept is when x = 0, and in the chart, when x equals 0, y equals 10.
10 = 10, so they have the same y-intercept.
2000=1000(1+10r)
Solve for r
R=(2000/1000)-1)/10
R=0.10*100=10%
Let
the amount of money invested at 9% and
the amount of money invested at 5%. The amount invested at 5% (
) is 1700$ less than the amount invested at 9% (
) it means:
(equation 1)
The investments produced 223$ which means:
. (equation 2)
We use the first equation to eliminate
from equation 2:
He invested 2200$ at 9% and 500$ at 5%.
Use exponential law, we have