Solve.A comet follows the hyperbolic path described by 
where x and y are in millions of miles. If the sun is the focus of the path, how close to the sun is the vertex of the path?
A. 10 million mi
B. 3.7 million mi
C. 0.7 million mi
D. 2.4 million mi
Answer: C
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?Fill in the blank to make the following number divisible by 18, and explain why: 6488__
A. ?1, because the sum of the digits must be divisible by 9. B. ?4, because the number must end in an even number. C. ?4, because the number must end in an even number and the sum of the digits must be divisible by 9. D. ?there is no number that will work. E. ?any even number that will make the sum of the digits equal to a multiple of 3.
Provide an appropriate response.Solve the fractional equation, identifying excluded values: 
x + 6 = 
x
A. -6
B. 6
C. -60
D. 60
Add. Write the answer in lowest terms.
A. 49
B. 10
C. 29
D. 6
Find the exact acute angle ? for the given function value.csc ? = 
A. 60° B. 30° C. 45°