<u>Part 1)</u> we have
------> equation A

------> equation B
Substitute the equation B in equation A
![5[12-3y]+2y=16](https://tex.z-dn.net/?f=5%5B12-3y%5D%2B2y%3D16)



Find the value of x
the best approximation is the point 
therefore
<u>the answer Part 1) is the option C</u>

<u>Part 2) </u>we have
------> equation A
------> equation B
equate equation A and equation B



Find the value of y
the solution is the point 
therefore
<u>the answer Part 2) is </u>

Answer: graph E.
A geometric sequence can be written as:

where:
a₁ = first term = 4
r = ratio = 0.5
Substituting the numbers, we have:

or else

This is an exponential function with base less than 1. Therefore, we can exclude graph C (which depicts a linear function), and graphs A and D (which depict an exponential function with base greater than 1).
In order to choose between graph B and E, let's evaluate the function in two different points:


Therefore, we need to look for the graph passing through the points (1, 4) and (2, 2). That is graph E.
Amount after 3 years = 4000( 1 + 0.04)^3 = $4,499.46 answer