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. x + 6y = -32x + 12y = -6
A. (-3, 0)
B. (0, 0)
C. 
or (-6y - 3, y)
D. no solution
Answer: C
Mathematics
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Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Mathematics
Use the FOIL method to multiply the binomials. Assume any variable exponents represent whole numbers.(x + 7y)(x + 2y)
A. x2 + 9xy + 14y2 B. x + 9xy + 14y C. x2 + 6xy + 14y2 D. x2 + 9xy + 9y2
Mathematics
Express the sum in sigma notation.7 + 8 + 9 + 10 + 11 + 12
A. 
B. 
C. 
k
D. 
+ 7
Mathematics
Find f(x) = a(x - h)2 + k so that f models the data exactly.
A. f(x) = 2(x - 7)2 - 3
B. f(x) = 
(x - 3)2 - 7
C. f(x) = (x + 3)2 + 7
D. f(x) = 
(x + 3)2 + 7
Mathematics