Simplify. If an expression does not represent a real number, state this. 
A. not a real number
B. -6.4
C. 2
D. -2
Answer: D
Mathematics
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Find the standard-form equation of the hyperbola centered at the origin which satisfies the given conditions.A hyperbola having a focus at (0, - 2
) and corresponding directrix 
.
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Solve the problem.The dosage instructions on a prescription call for a patient to take 1
tablets of a 20-milligram medication four times a day for 14 days. How many tablets will the patient take in the 14-day period?
A. 315 tablets B. 84 tablets C. 21 tablets D. 56 tablets
Mathematics
Determine if the given ordered pair is a solution of the equation.x + y = 15; (8, 7)
A. Not a solution B. A solution
Mathematics
Perform the exponentiation. 
2
A. 
B. 
C. - 
D. - 
Mathematics