Find the directrices of the hyperbola.x2 - y2 = 16
A. x = ± 
B. x = ± 
C. y = ± 4
D. y = ± 
Answer: A
Mathematics
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Solve the problem. Round to the nearest cent or tenth of a percent.Cost = $9.05; markup rate of 28.3% based on the selling. Find the markup and the selling price.
A. Markup = $2.56 Selling price = $11.61 B. Markup = $2.56 Selling price = $6.49 C. Markup = $3.57 Selling price = $5.48 D. Markup = $3.57 Selling price = $12.62
Mathematics
Decide whether or not the ordered pair is a solution of the system.(-5, 3)x + y = 8x - y = 2
A. No B. Yes
Mathematics
Select the graph of the function: 
a. 
b. 
c. 
d. 
Mathematics
Solve the equation. Use words or set notation to identify equations that have no solution, or equations that are true for all real numbers. -3(x + 7) + 33 = 3x - 6(x + 5)
A. {3} B. ? C. {x|x is a real number} D. {63}
Mathematics