Add or subtract as indicated.(-6x6 + 9x8 - 7 - 2x7) - (8 - 5x7 + 2x8 - 4x6)
A. 7x8 - 7x7 - 10x6 + 1
B. 11x8 - 7x7 - 10x6 - 15
C. 7x8 + 3x7 - 2x6 - 15
D. 11x8 - 7x7 - 10x6 + 1
Answer: C
Mathematics
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Write a fraction to represent the shaded portion of the figure.
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Solve the problem.A grain dealer sold to one customer 5 bushels of wheat, 2 of corn, and 3 of rye, for $26.80; to another, 2 of wheat, 3 of corn, and 5 of rye, for $28.30; and to a third, 3 of wheat, 5 of corn, and 2 of rye, for $29.60. What was the price per bushel for corn?
A. $3.42 B. $1.70 C. $4.00 D. $1.20
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Evaluate the series.
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B. 
C. 
D. 
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Write a system of equations associated with the augmented matrix. Do not try to solve.
A. 15x + 5y = 13 7x + 2y = 12 B. 5x + 15y = 13 2x + 7y = 12 C. 15x + 5y = 13 2x + 7y = 12 D. 15x + 5y = -13 2x + 7y = -12
Mathematics