Solve using the substitution method. Use a graphing calculator to check your answer. x + 4y = 23 9x + 4y = -17
A. (-5, 7)
B. (5, 6)
C. (-4, 6)
D. No solution
Answer: A
Mathematics
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A. 
B. 36
C. 
D. -36
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Answer true or false.
= 
= - 
A. True B. False
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A. 
B. 0
C. 2
D. undefined
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