Express the given logarithm as a sum and/or difference of logarithms. Simplify, if possible. Assume that all variables represent positive real numbers.log3 

A. 5 log3x + 3 log3y + log37
B. 5 log3x - 3 log3y - log37
C. 5 log3x + 3 log3y - log37
D. (5 log3x)(3 log3y) - log37


Answer: C

Mathematics

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Write the phrase as a mathematical expression. Use x as the variable.Some number multiplied by 7.74

A.
B. 7.74 - x
C. 7.74 + x
D. 7.74x

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Perform the indicated operation. Simplify, if possible. - 

A.
B.  
C.  
D.  

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Calculate how many times more intense an earthquake with a Richter number of 8.3 is than an earthquake with a Richter number of 6.9. Please round the answer to the whole number. 

A. 30 B. 33 C. 25 D. 35 E. 27

Mathematics