Question

Hanai invested $20,000, part at 3% interest and part 5% interest. The investment returned $800. What is the system of equations that represents this situation

Answer 1

x+y=20,000

.03x+.05y=20,000

Explanation:

Answer 2

• t + f = 20000
• 3%·t + 5%·f = 800

Explanation:

Let t represent the amount invested at three percent; let f represent the amount invested at five percent. The total of these amounts is $20,000. The total of the interest earned by each amount is $800. Of course the interest earned is the amount multiplied by the interest rate.