Solve the system by the elimination method or a combination of the elimination and substitution methods.x2 + 4xy + 2y2 = 1 x2 - 4xy - 2y2 = 1
A. {(1, 0), (-1, 0), (1, -2), (-1, 2)}
B. {(1, 1), (-1, -1), (1, -2), (-1, 2)}
C. {(1, 0), (1, 1)}
D. {(1, -2), (-1, 2)}
Answer: A
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For the pair of functions, perform the indicated operation.f(x) = x2 + 1, g(x) = 2x - 7
Find (f ? g)(x).
A. 2x3 + 2x2 - 7x - 7 B. 2x2 + 2x - 7 C. 2x3 - 7x2 + 2x - 7 D. 2x3 - 7
Solve for the amount of discount and amount due.Invoice amt: $1,474Invoice date: May 16Terms: 4/10, n/60Shipping/Insurance: $33.05Date paid: May 24
A. Amount of discount: $60.28; amount due: $1,446.77 B. Amount of discount: $58.96; amount due: $1,448.09 C. Amount of discount: $0; amount due: $1,507.05 D. Amount of discount: $58.96; amount due: $1,381.99
Find all complex number solutions.x2 = -252
A. -6i
B. 6
C. -6
D. ± 6i
Find an equation for the hyperbola described.Center at (6, 7); focus at (-1, 7); vertex at (5, 7)
A. (x - 7)2 - 
= 1
B. 
- (y - 6)2 = 1
C. 
- (y - 7)2 = 1
D. (x - 6)2 - 
= 1