Add or subtract as indicated. Write the answer in simplest form.- 
+ 
+ 
A. 
B. - 
C. 
D. - 
Answer: D
Mathematics
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Graph the hyperbola. Give the coordinates of the center as well as the values of a and b.y2 - 9x2 = 81
A. center (0, 0), a = 9, b = 3
B. center (0, 0), a = 9, b = 3
C. center (0, 0), a = 3, b = 9
D. center (0, 0), a = 3, b = 9
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 
C. 
D. 
Mathematics
Use the Distributive Property to remove the parentheses.4
A. 2x - 
B. 2x - 
C. 
x - 
D. 2x - 
Mathematics
Find the indicated probability.A card is drawn from a well-shuffled deck of 52 cards. What is the probability of obtaining a club or a 6?
A. 
B. 
C. 
D. 
Mathematics