Part of $2,600 is invested at 12%, another part at 13%, and the remainder at 14%. The total yearly income from the three investments is $347. The sum of the amounts invested at 12% and 13% equals the amount invested at 14%. Determine how much is invested at each rate.
A. $800 at 12%, $500 at 13%, $1,300 at 14%
B. $400 at 12%, $900 at 13%, $1,300 at 14%
C. $400 at 12%, $1,300 at 13%, $900 at 14%
D. $300 at 12%, $1,000 at 13%, $1,300 at 14%
E. $500 at 12%, $1,000 at 13%, $1,100 at 14%
Answer: B
Mathematics
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Solve the system mentally, without the use of a calculator or pencil-and-paper calculation. Try to visualize the graphs of both lines.x - 0y = 53x + y = 7
A. x = -5; y = 8 B. x = 5; y = -8 C. x = 3, y = 7 D. x = 5; y = 4
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