SOLUTION: What is the mathematical expression of this. The total interest earned after one year when Php 120,000.00 is invested, part of 8% annual interest rate and the remaining part at 4.5

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Question 1188283: What is the mathematical expression of this. The total interest earned after one year when Php 120,000.00 is invested, part of 8% annual interest rate and the remaining part at 4.5% annual interest rate
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
What is the mathematical expression of this. The total interest earned after one year when Php 120,000.00 is invested, part of 8% annual interest rate and the remaining part at 4.5% annual interest rate
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e = part at 8%
f = part at 4.5%
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e + f = 120,000

Answer by ikleyn(52767) About Me  (Show Source):
You can put this solution on YOUR website!
.
What is the mathematical expression of this. The total interest earned after one year when Php 120,000.00 is invested,
part of 8% annual interest rate and the remaining part at 4.5% annual interest rate
~~~~~~~~~~~~~~~~~

x          = part at 8%

120000 - x = part at 4.5%


The total interest earned after one year is  0.08x + 0.045*(120000-x).      ANSWER

Solved and thoroughly explained.