Solve the system of equations by the substitution method. x + 8y = -49-4x + 7y = -77
A. {(-7, -6)}
B. {(7, -7)}
C. {(6, -6)}
D. ?
Answer: B
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Solve.
x = - 
A. - 
B. - 
C. 
D. 
For the given function, find each of the following:(A) Intercepts(B) Vertex(C) Maximum or minimum(D) Rangef(x) = (x + 4)2 - 9
A. (A) x-intercepts: - 7, -1; y-intercept: 7 (B) Vertex (-4, -9) (C) Maximum: -9 (D) y ? -9 B. (A) x-intercepts: 1, 7; y-intercept: 7 (B) Vertex (-4, -9) (C) Minimum: -9 (D) y ? -9 C. (A) x-intercepts: - 7, -1; y-intercept: 7 (B) Vertex (-4, -9) (C) Minimum: -9 (D) y ? -9 D. (A) x-intercepts: - 7, -1; y-intercept: 7 (B) Vertex (4, -9) (C) Minimum: -9 (D) y ? -9
Solve the system using the inverse matrix method.
A. x = 5, y = 2, z = -2; (5, 2, -2) B. x = 2, y = 5, z = 2; (2, 5, 2) C. x = 5, y = -2, z = 2; (5, -2, 2) D. x = -5, y = -2, z = -2; (-5, -2, -2)
Fill in the blank with the correct inequality symbol.If x < -10, then x + 10 
0.
A. > B. ? C. < D. ?