Solve using the problem-solving strategy for systems of linear equations.A retired couple has $170,000 to invest to obtain annual income. They want some of it invested in safe Certificates of Deposit yielding 7%. The rest they want to invest in AA bonds yielding 12% per year. How much should they invest in each to realize exactly $18,400 per year?
A. $140,000 at 12% and $30,000 at 7%
B. $130,000 at 7% and $40,000 at 12%
C. $120,000 at 7% and $50,000 at 12%
D. $130,000 at 12% and $40,000 at 7%
Answer: D
Mathematics
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A. 
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Mathematics