Solve the equation.5(z + 2) - (4z - 6) = -7
A. 23
B. 9
C. 15
D. - 23
Answer: D
Mathematics
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Evaluate the expression.(-4)-1
A. -4
B. - 
C. 
D. 4
Mathematics
Solve using matrices. x + y + z = 2 x - y + 5z = 163x + y + z = 8
A. (-3, 2, 3) B. (2, -3, 3) C. (3, -3, 2) D. (2, 3, -3)
Mathematics
Solve the system by substitution. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x.x + 3y = 32x = -6y + 6
A. (3, 3)
B. Dependent, (x, -3x + 3)
C. Dependent, 
D. Inconsistent, ?
Mathematics
Find: a. The center and radius of the circle. b. The x- and y-intercepts of the graph of the circle.4x2 + 4y2 - 2y = 0
A. a. center = 
; radius = 
b. 
B. a. center = 
; radius = 
b. (0, 0), 
C. a. center = 
; radius = 
b. (0, 0)
D. a. center = 
; radius = 
b. (0, 0), 
Mathematics