Simplify the expression. Assume all variables represent positive real numbers.

A. 5xy 
B. 5xy2  
C. 5x2y2 
D. 5xy 

Answer: D

Mathematics

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Simplify. ? 

A. 21
B. 21
C. 18
D. 42

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Solve the compound inequality and graph the solution set on a number line. Except for the empty set, express the solution set in interval notation.x < 3 or x < 7

A. (-?, 7)

B. (-?, 3)

C. (3, 7)

D. (-?, 3) ? (7, ?)

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Write the expression as the sum or difference of multiples of logarithms.logb 

A. (logb a5 + logb3)
B. 5 logb a + 1
C. 4 logb a - 
D.  logb a + 

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Provide an appropriate response.Consider the selections of particular thirteen card bridge hands. Is this a combination, a permutation, or neither?

A. Combination B. Permutation C. Neither

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