Work. Do Not Solve

Multiple Choice

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.
-A retired couple has $140,000 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 10% per
Year. How much should they invest in each to realize exactly $12,500 per year?

A) $90,000 at 10% and $50,000 at 7%
B) $100,000 at 10% and $40,000 at 7%
C) $80,000 at 7% and $60,000 at 10%
D) $90,000 at 7% and $50,000 at 10%