# Linear Systems (Investment Problems)

1. 1
Karin deposited a total of 10,000 dollars in two separate accounts. One account paid 5% interest per annum, and the other paid 8% interest per annum. If the total interest earned after one year was $620, how much was invested at each rate? 2. 2 Brad invested 15,000 dollars. Part of the money received 4% interest per annum, and the remaining part received 7% interest per annum. If the total interest earned after one year was$840, how much was invested at each rate?
3. 3
Grant invested 9,500 dollars. Part of the money received 3% interest per annum, and the remaining part received 6% interest per annum. If the total interest earned after one year was $420, how much was invested at each rate? 4. 4 Matt invested 12,000 dollars. Part of the money received 4.5% interest per annum, and the remaining part received 5.5% interest per annum. If the total interest earned after one year was$610 how much was invested at each rate?
5. 5
Alex split 5,000 dollars between two accounts. One account received 3.5% interest per annum, and the remaining part received 6.5% interest per annum. If the total interest earned after one year was $265, how much was invested at each rate 6. 6 Hope split 11,000 dollars between two investments. One investment received 6% interest per annum, and the other investment received 5% interest per annum. After one year, the interest earned at 6% was$220 more than the interest earned at 5%. How much was invested at each rate?
7. 7
Heather split 7,000 dollars between two investments. One investment received 5.5% interest per annum, and the other investment received 7.5% interest per annum. After one year, the interest earned at 5.5% was $135 less than the interest earned at 7.5%. How much was invested at each rate? 8. 8 Emily invested 18,000 dollars in two accounts. One investment received 7.3% interest per annum, and the other investment received 6.4% interest per annum. After one year, the interest earned at 7.3% was$218 more than the interest earned at 6.4%. How much was invested at each rate?

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