Solve the equation by making an appropriate substitution.2 - 12 - 28 = 0

A. {- 5, 3}
B. {-2, 14}
C. {- 5, - 1, 3, 15}
D. no solution

Answer: C

Mathematics

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Solve the problem.Linda invests $25,000 for one year. Part is invested at 5%, another part at 6%, and the rest at 8%. The total income from all 3 investments is $1600. The total income from the 5% and 6% investments is equal to the income from the 8% investment. Find the amount invested at each rate.

A. $8000 at 5%, $10,000 at 6%, $7000 at 8% B. $10,000 at 5%, $10,000 at 6%, $5000 at 8% C. $5000 at 5%, $10,000 at 6%, $10,000 at 8% D. $10,000 at 5%, $5000 at 6%, $10,000 at 8%

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Mathematics