Use the substitution method or the elimination method to solve the system. If the system has infinitely many solutions, express the ordered pair in terms of x or y. 6x + y = 7-18x - 3y = -21
A. 
or (y, -6y + 7)
B. (x, -6x + 7) or 
C. no solution
D. (x, 6x + 7) or 
Answer: B
Mathematics
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A. $11.35 B. $10.00 C. $9.64 D. $9.79
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Complete.
= 
A. 
B. 
C. 
D. 
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Use Cramer's rule to solve the linear system.2x + 2y = 23x + y = -3
A. (3, -2) B. (-2, 3) C. (-3, -2) D. (2, -3)
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Find the exact value of the expression if ? = 30°. Do not use a calculator.g(?) = cos ?Find g(2?).
A. 
B. 
C. 1
D. 
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