annual interest
posted by Anonymous .
you invested 12000 in two accounts paying 5% and 7% annual interest. If the totak interest earned for the year was 760 how much was invested at each rate?

annual interest 
MathMate
12000*0.05=600
12000*0.07=840
Proportion at 5% = (840760)/(840600)=1/3
Proportion at 7% = (760600)/(840600)= 2/3 (or 11/3=2/3)
(1/3) of 12000 = 4000 at 5%
(2/3) of 12000 = 8000 at 7% 
annual interest 
Reiny
or
amount invested at 5%  x
amount invested at 7%  1200x
.05x + .07(12000x) = 760
5x + 7(12000x) = 76000
2x = 8000
x = 4000 at 5% , then 120004000 or 8000 at 7%
Respond to this Question
Similar Questions

Math
You invested $14,000 in two accounts paying 5% and 9% annual interest, respectively. If the total interest earned for the year was $820, how much was invested at each rate? 
math
you invested $4000 in two accounts paying 2% and 9% annual interest, respectively if the total interest earned for the year was $150, how much was invested at each rate. $_was invested at 2% and _$ was invested at 9% 
algebra
An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested … 
math
An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested … 
math
An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested … 
math
An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested … 
math
you invested $8000 between two accounts paying 7% and 9% annual interest, respectively. If the total interest earned for the year was $600 how much was invested at each rate? 
Algebra
You invested 20,000 in two accounts paying 4% and 7% annual interest, respectively. If the total interested earned for the year was $830, how much was invested at each rate? 
algebra
You invested $27,000 in two accounts paying 2% and 3% annual interest, respectively.If the total interest earned for the year was $ 800, how much was invested at each rate? 
simple interest
A total of $12,000 is invested into two simple interest accounts. On one account the annual simple interest rate is 12%, while on the second account the annual interest rate is 18%. How much should be invested at 12% so that the interest …