Solve the problem.The sum of the digits of a 3-digit number is 18. The units digit is one less than the tens digit and the tens digit is one less than the hundreds. What is the number?
A. 876
B. 765
C. 865
D. None of these
Answer: B
Mathematics
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Find the vertex and axis of symmetry of the graph of the function.f(x) = -6x2 - 2x - 12
A. (6, -12); x = 6
B. 
; x = 
C. 
; x = - 
D. 
; x = -6
Mathematics
Find the vertex, the focus, and the directrix of the parabola.y2 - 8x - 6y + 17 = 0
A. Vertex: 
; Focus: 
; Directrix: y = 
B. Vertex: 
; Focus: (3, 3); Directrix: x = -1
C. Vertex: 
; Focus: (-1, 1); Directrix: y = 3
D. Vertex: 
; Focus: (9, 1); Directrix: y = 7
Mathematics
Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = 8 B. x = 0 C. none D. x = -8
Mathematics
Solve: 
A. 
B. 
C. 
D. 
Mathematics