Answer:
584.03
Step-by-step explanation:
Given that principal amount = 500.20 dollars
Interest rate = 3 7/8% p.a.= 3100/8(12) per month
Period = 4 years = 4(12) = 48 months.
A= P(1+r/n)^nt
Here n = 12 t = 4 years.
Substitute to get
Future value = 
=584.03
Answer:
1. C -> Marty's with a slope of 1/3
2.C -> 2x + 5y = -15
3. C -> y = 1/4x + 2
4. A -> x - 4y = 8
5. D -> 5
The amount invested at 4% is $4,200. This problem can be solved by using two linear equation with two different variables which represent the investment's partition and the investment's return. The first equation is x+y=$7,600 and the second equation is 0.04x + 0.05y=$338, then you must substitute the y variable in the second question with the first equation (0.04x + 0.05($7,600-x)=$338). Therefore, you will get a new equation to solve the problem which is 0.04x+380-0.05x=338 resulting x=$4,200.
