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anai invested $20,000, part at 3

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter9: Quadratic Functions And Equations

Section9.7: Solving Systems Of Linear And Quadratic Equations

Problem 30HP

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Question

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

b. How was the original $20,000 investment split between the two interest rates?
c. How would the investment need to be split to make more than $800? How do you know?

of 7 b. How was the original $20,000 investment split between the two interest
rates?
c. How would the investment need to be split to make more than $800?
How do
you
know?
Continue on the following page

c. Show the solution graphically.
4. Hanai invested $20,000, part at 3% interest and part at 5% interest. The
investment returned $800.
a. What is the system of equations that represents this situation?
Continue on the following page

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