algebra
posted by Briana .
HELP! Please
Calvin invested $7500 for one year, part 12% annual interest and the rest at 10% annual interest. His total interest for the year was $890. How much money did he invest at 12%? Show work.

$X @ 12%.
$(7500X) @ 10%
I = 0.12X + 0.1(7500X) = $890.
0.12x + 750  0.1x = 890.
02x = 890  750 = 140
X = $7,000 @ 12%.
Respond to this Question
Similar Questions

Math
Rosa invested $8000 for one year, part ast 8% annual interest and the balance at 10% annual interest. Her total interest for the year was $700. How much money did she invest at each rate? 
algebra
Calvin invested $7500 for one year, part 12% annual interest and the rest at 10% annual interest. His total interest for the year was $890. How much money did he invest at 12%? 
Algebra 2 & trig
joanna invested $7500, part at a 5.5% and the remainder at a 6% annual rate of interest. if she collected a total of 435 in interest at the end of one year, how much money was invested at each rate? 
Math
A woman has money in two accounts. One account pays 7% annual interest, whereas the other pays 15% annual interest. If she has $1,500 more invested at 15% than she does at 7% and her total interest for a year is $1,545, how much does … 
Math
tracy invested $6000 for one year, part at 10% annual and the balance at 13% annual interest. her total interest for the year was $712.5. how much money did she invested at each rate? 
math
Rosa invested $8000 for one year, part ast 8% annual interest and the balance at 10% annual interest. Her total interest for the year was $700. How much money did she invest at each rate? 
algebra
mary had 25000 dollars to invest. she invested part of that amount at 3% annual interest and part at 5% annual interest for one year. the amount of interest she earned for both investments was 1100. how much was invested at each rate 
Algebra
Kim invested a total of $1500 in two accounts. One account paid 2% annual interest and the other paid 4% annual interest. After one year, Kim earned $44 in interest. How much did she invest in each account? 
Algebra
Alex deposited $7500 in a year. The annual interest fees were at 12% and 10% respectively. The total interest payed was $890. How much was paid at the 12% fee. I got as far as the equation portion of the problem. I was somewhere around … 
algebra
sam saved his money until he had $10000 to invest.he invested x dollars into certificate of deposit (cd) with an annual interest rate of 2% and the remaining y dollars into a mutual fund with annual interest of 1.5% total interest …