Solve.In September, Justin's telephone bill was $103.27. In October, his telephone bill was $143.77. What is the difference in cost between his October bill and his September bill?
A. $50.50
B. $41.50
C. $40.50
D. $40.40
Answer: C
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Find the asymptotes of the hyperbola.7x2 - y2 - 84x + 6y - 100 = 0
A. y - 6 = 
(x - 3), y - 6 = -
(x - 3)
B. y - 3 = 
(x - 6), y - 3 = - 
(x - 6)
C. y - 3 = 7(x - 6), y - 3 = -7(x - 6)
D. y - 3 = 
(x - 6), y - 3 = -
(x - 6)
Factor the special products, which are the sum or difference of two perfect cubes.729c3 + 125
A. (9c + 5)(81c2 - 45c + 25) B. (9c - 5)(81c2 + 45c + 25) C. (9c + 5)(81c2 + 25) D. (729c + 5)(c2 - 45c + 25)
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.A number multiplied by -4, subtracted from the sum of 19 and eight times the number.
A. 4x - 27 B. 4x - (19 + 8x); -4x - 19 C. (19 + 8x) - (-4)x; 19 + 12x D. (19 + 8x) + (-4)x; 19 + 4x
Perform the indicated operation. Where possible, reduce the answer to its lowest terms.
A. 8
B. 12
C. 15
D. 16