Use the indicated property to provide a new expression equal to the given expression. Simplify, if possible.(4x + 6y) + 9z; associative
A. 4x + (6y + 9z)
B. 4x + 6y + 9z
C. (4x + 6y + 9z)
D. (6y + 4x) + 9z
Answer: A
Mathematics
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Express as a single logarithm and, if possible, simplify. log(t3 + 343) - log(t + 7)
A. log(t2 + 7t + 49)
B. 
C. log(t2 - 7t + 49)
D. log(t3 - t + 343)
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Solve the problem.The decline in the value of a stock can be estimated by the function 
where x is the year with 1990 ? x ? 2000. What is the slope of the graph of f?
A. -0.61 B. 0.61 C. 76 D. 1289.9
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Complete the identity.sec4 ? + sec2 ? tan2 ? - 2 tan4 ? = ?
A. sec2 ? + 2 B. tan2 ? - 1 C. 3 sec2 ? - 2 D. 4 sec2 ?
Mathematics
What percent of 
is 
? Round to the nearest tenth of a percent when necessary.
A. 56.0% B. 3.5% C. 2.9% D. 30.8% E. 28.6%
Mathematics