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Let's say that the value invested in the account with a rate of 8% is "x", then the amount invested in the account with a rate of 12% is:

To calculate the total interest we need to calculate the interest of each individual account and sum them:

The total interest is the sum of the two expressions above:

The value invested in the account with 8% interest is 830, the one invested in the account with 12% interest is 1280.
Answer:
-1.5
Step-by-step explanation:
You were on the free points page
Im not sure but I think the answer is most likely...
D) 10.
Hope I helped :-)