Find the standard equation of a parabola with the given focus or directrix. Assume that the vertex is at the origin.Focus 
A. x2 = - 
y
B. x2 = -76y
C. y2 = - 
x
D. y2 = - 
x
Answer: D
Mathematics
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Subtract.38 - (-70)
A. 32 B. -32 C. -108 D. 108
Mathematics
Factor.20z4 + 3z2 - 9
A. (5z2 + 3)(4z2 - 3) B. (5z4 + 3)(4z - 3) C. (4z2 + 3)(5z2 - 3) D. (4z4 + 3)(5z - 3)
Mathematics
Solve the problem.A new health food store runs an advertising campaign. Daily sales (in dollars) after x days of advertising are given by ?S(x) = 
By sketching the graph of this function, answer the following questions. What is the horizontal asymptote of the graph? What does this suggest about future sales? Explain your reasoning. If the advertising campaign costs $3200 per day, at what point should it be discontinued? Why?
What will be an ideal response?
Mathematics
Solve by completing the square.16b2 + 40b + 9 = 0
A. - 
, 
B. - 
, - 
C. 
, 
D. - 
, - 
Mathematics