Solve by the substitution method. x + 7y = -49-4x + 8y = -56
A. {(7, 0)}
B. {(0, -7)}
C. {(1, -8)}
D. ?
Answer: B
Mathematics
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Perform the indicated operation and simplify if possible.
A. 9
B. 3
C. 
D. 
Mathematics
Solve the problem.Determine the symmetry type of the object shown below.
A. D14 B. Z7 C. D7 D. Z14 E. none of these
Mathematics
Solve by the substitution method.8x + 7y = -7 -6x - 4y = 4
A. (0, 0) B. (-1, 0) C. (-7, 4) D. (0, -1)
Mathematics
Convert. When necessary, round the answer to two decimal places.6 tons = ____ pounds
A. 6000 B. 1200 C. 12,000 D. 96
Mathematics