Simplify the complex rational expression.

A.
B.
C. x - 9
D. -9

Answer: A

Mathematics

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Solve.A construction company incurred the following expenses on a job: gravel, $92.48; sand, $51.43; cement, $202.29; bricks, $240.82; and labor, $658.35. If the company charged $1600 for the job, what was the profit?

Fill in the blank(s) with the appropriate word(s).

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Solve the problem.The hydrogen ion concentration of a substance is about 4.2 × 10-6 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].

A. 6.6 B. -6.6 C. 5.7 D. 5.4

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Use factoring to solve the equation.12d2 + 38d + 30 = 0

A. - , -  
B. - , -  
C. ,  
D. , 

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Find the domain of the given function. f(x) = 

A. (-?, -5] ? [11, ?) B. [-11, 5] C. (-?, -11] ? [5, ?) D. [-11, ?)

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