Find the vertex of the parabola, and determine whether the parabola opens upward, downward, to the left, or to the right.y = -(x + 6)2 + 4
A. (4, -36), up
B. (-6, 4), down
C. (-4, 6), down
D. (4, -6), up
Answer: B
Mathematics
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Sketch the surface z = f(x,y).f(x, y) = 2 -x2 - y2
A. 
B. 
C. 
D. 
Mathematics
The profit earned when n items are produced is given by the function 
. If either increasing production or decreasing production will result in a decrease in profits, what can be said about marginal profit 
?
?
A. is positive.
B. is negative.
C. is zero.
D. is linear.
Mathematics
Determine the equation of the graph.
A. y = -sec
B. y = sec 2x
C. y = -sec 2x
D. y = sec
Mathematics
Multiply and simplify.(1 + cot ?)2
A. cos2? - cot ? B. csc2? + 2 cot ? C. 1 + 2 sin2? D. sin ? + csc ?
Mathematics