PLEASE HELP y =
+
Pro
Y
Pro
9+
8+
Tea
7+
6+
5+
4+
3+
2
1
-9-8 -7 -6 -5 -4 -3 -2
2
3
4 5 6 7 8 9
- 2
-3+
-4
-5+
-6+

cant open file sorry!

step-by-step explanation:

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.