Find the vertex, focus, and directrix of the parabola. Graph the parabola.y2 = -16x
A. vertex: (0, 0)
focus: (-4, 0)
directrix: x = 4
B. vertex: (0, 0)
focus: (4, 0)
directrix: x = -4
C. vertex: (0, 0)
focus: (0, -4)
directrix: y = 4
D. vertex: (0, 0)
focus: (0, -4)
directrix: y = 4
Answer: A
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Use Fleury's algorithm to find an Euler circuit for the graph beginning and ending at the indicated vertex. If no Euler circuit exists, state this.Using the following graph, find an Euler circuit that begins and ends with vertex C.
A. C ? D ? A ? E ? F ? A ? B ? C B. C ? D ? A ? E ? F ? A ? B ? C ? D C. No Euler circuit exists. D. C ? D ? A ? E ? F ? A ? B
Evaluate the numerical value of the formula with the given replacement values.N = 
a = 30, b = 17, c = 22
A. 69 B. 60 C. 17 D. 23
Simplify the expression. Assume that all variables represent positive real numbers.(125x6)-2/3
A. 
B. 
C. 25x25
D. 25x2
Find the inverse of the matrix, if possible.A = 
A. 
B. No inverse
C. 
D. 