Determine whether the equation defines y as a function of x.2x = 13 - 5y
A. Yes
B. No
Answer: A
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Answer the question based on the following situation:An honest coin is tossed 1600 times. The random variable X denotes the total number of heads that come up in the 1600 tosses.What are the chances that X is between 780 and 820?
A. approximately 95% B. approximately 68% C. approximately 34% D. approximately 80% E. none of these
State the domain of the rational function.g(x) = 
A. (-?, ?) B. (-?, -3) ? (-3, ?) C. (-?, 2) ? (2, ?) D. (-?, 0) ? (0, ?)
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.tan ? = 
, ? < ? < 
Find sin 
.
A. - 
B. - 
C. 
D. 
Find the vertex, focus, and directrix of the parabola with the given equation.(x + 1)2 = -20(y + 3)
A. vertex: (-1, -3) focus: (-1, -8) directrix: y = 2 B. vertex: (1, 3) focus: (1, -2) directrix: y = 8 C. vertex: (-1, -3) focus: (-1, 2) directrix: x = -8 D. vertex: (-3, -1) focus: (-3, -6) directrix: y = 4