Combine like terms.-4x9 + 7x7y - 15x9 - 
- 13x7y + 7x9
A. -18x9- 
B. -18x9 - 18x7y - 
C. -12x9 - 6x7y - 
D. -12x9 + 7x7y - 
Answer: C
Mathematics
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Find the inverse of the function.f(x) = 
, x ? 2
A. f-1(x) = x2 - 2, x ? 0 B. f-1(x) = x + 2, x ? 0 C. Not a one-to-one function D. f-1(x) = x2 + 2, x ? 0
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Graph the following equation using the square settings given.f(x) = 
[-12, 12] by [-8, 8]
A. 
B. 
C. 
D. 
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Solve the problem.The stock market gained 17 points on Tuesday and lost 54 points on Wednesday. It had closed on Monday at 2563 points. Where did the market close on Wednesday?
A. 2600 points B. 2492 points C. 2634 points D. 2526 points
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Find the x-intercepts of the graph of the quadratic function y = x² - 121.
Mathematics