Find an equation of a parabola that satisfies the given conditions.Focus at (4, 0), directrix x = -4
A. y2 = 16x
B. 16y2 = x
C. 16y = x2
D. 16x = y2
Answer: D
Mathematics
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Solve the rational equation.
= 1 - 
A. {18} B. {0} C. {-9, 1} D. {1}
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Solve the problem.Suppose an experiment consists of tossing a coin seven times and recording the sequences of heads and tails.(a) How many outcomes are possible?(b) How many outcomes have exactly three heads?(c) How many outcomes have at least three heads?
What will be an ideal response?
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Find the exact value. Do not use a calculator.cos ?
A. 1 B. 0 C. -1 D. undefined
Mathematics
Analyze and sketch a graph of the function 
.
??
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics