Solve the system of equations using the addition method.4x - 2y = 4-6y = 12 - 12x
A. (0, 0)
B. (4, -2)
C. infinite number of solutions
D. no solution
Answer: C
Mathematics
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Find the exact value of the expression.tan 
A. -2 - 
B. 2 + 
C. 2 - 
D. 
- 2
Mathematics
Determine the local extrema of the function.f(x, y) = x3 + y3 - 9xy
A. f(3, 3) = -27, minimum B. f(1, 1) = -7, minimum C. no local extrema D. f(2, 2) = -20, minimum
Mathematics
Decide whether the ordered pair is a solution of the given system.(-1, 5)x + y = 6x - y = -4
A. Yes B. No
Mathematics
Factor. Check by multiplying.
x - 
y + 
A. 
B. 
(x + 11y - 5)
C. 8(x - 11y + 5)
D. 
(x - 11y + 5)
Mathematics