Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log7

A. 5log7y
B. log7
C. log7y
D. log5y

Answer: C

Mathematics

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Subtract.8,827

A. 8,355 B. 4,311 C. 4,355 D. 4,351

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Mathematics

Write the sentence as a mathematical statement.Eighty-nine is not equal to negative eighty-nine.

A. 89 ? -89 B. 89 ? -89 C. 89 = -89 D. 89 ? -89

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Mathematics

Solve the problem.The formula P = 14.7e-0.21x gives the average atmospheric pressure, P, in pounds per square inch, at an altitude x, in miles above sea level. Find the average atmospheric pressure for an altitude of 2.3 miles. Round your answer to the nearest tenth.

A. 7.8 lb/in.2 B. 8.4 lb/in.2 C. 11.0 lb/in.2 D. 9.1 lb/in.2

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Mathematics

Solve the equation algebraically.6 + x = 3

A. 21 - 12
B. -21 ± 12
C. 21 ± 12
D. 221 ± 212

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Mathematics