work. Do not solve.
-5x + 9y = -12
-4x - 4y = -32
A) Substitution B) Addition
Answer: B
Write the word or phrase that best completes each statement or answers the question.
-Mardi received an inheritance of $70,000. She invested part at 10% and deposited the remainder in tax-free bonds at 9%. Her total annual income from the investments was $6600. Find the amount
Invested at 10%.
A) $29,000
B) $15,000
C) $30,000
D) $63,400

Question

Quizplus · Accepted Answer

Let x be the amount invested at 10%. 
Then the amount invested at 9% is (70000 - x). 
We can set up the following equation based on the given information:

0.10x + 0.09(70000 - x) = 6600

Simplifying this equation, we get: 
0.01x = 300

Solving for x, we get: 
x = 30000

Therefore, Mardi invested $30,000 at 10%.

Work. Do Not Solve