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29 Apr 2019, 05:58
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (00:58) correct
21%
(01:53)
wrong
based on 118
sessions
History
Date
Time
Result
Not Attempted Yet
\((\frac{45^{-1} + 5^{-1}}{10})^{-1}\)
A. 1/45
B. 1/40
C. 2/9
D. 5
E. 45
A. 1/45
B. 1/40
C. 2/9
D. 5
E. 45
29 Apr 2019, 06:13
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OA:E
\((\frac{45^{-1} + 5^{-1}}{10})^{-1}\)
\((\frac{\frac{1}{45}+\frac{1}{5}}{10})^{-1}=(\frac{\frac{1+9}{45}}{10})^{-1}=(\frac{\frac{10}{45}}{10})^{-1}=(\frac{10}{45*10})^{-1}=(\frac{1}{45})^{-1}=45\)
\((\frac{45^{-1} + 5^{-1}}{10})^{-1}\)
\((\frac{\frac{1}{45}+\frac{1}{5}}{10})^{-1}=(\frac{\frac{1+9}{45}}{10})^{-1}=(\frac{\frac{10}{45}}{10})^{-1}=(\frac{10}{45*10})^{-1}=(\frac{1}{45})^{-1}=45\)
29 Apr 2019, 06:31
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