Answer: Option 'B' is correct.
Step-by-step explanation:
since we have given that
Time taken to build a cabinet by Genna = 4 hours.
Time taken to build a cabinet by Claude = 3 hours
Now, time taken by both Genna and Claude to build a cabinet together is to be find.
Work done by Genna is given by
![\frac{1}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D)
Work done by Claude is given by
![\frac{1}{3}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B3%7D)
According to question,
![\frac{1}{4}+\frac{1}{3}=\frac{1}{x}\\\\\frac{3+4}{12}=\frac{1}{x}\\\\\frac{7}{12}=\frac{1}{x}\\\\x=\frac{12}{7}\\\\x=1\frac{5}{7}\ hours](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D%2B%5Cfrac%7B1%7D%7B3%7D%3D%5Cfrac%7B1%7D%7Bx%7D%5C%5C%5C%5C%5Cfrac%7B3%2B4%7D%7B12%7D%3D%5Cfrac%7B1%7D%7Bx%7D%5C%5C%5C%5C%5Cfrac%7B7%7D%7B12%7D%3D%5Cfrac%7B1%7D%7Bx%7D%5C%5C%5C%5Cx%3D%5Cfrac%7B12%7D%7B7%7D%5C%5C%5C%5Cx%3D1%5Cfrac%7B5%7D%7B7%7D%5C%20hours)
Hence, Option 'B' is correct.
Sorry, but I generally respond to only 1 or 2 problems when someone gives me a long list of homework. It would take you just a little longer to post one problem at a time.
75 5 -375
Let's look at #5: 75 / (-1/5) is the same as -------- = 75 * ------ = --------- -1 -1 1
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5
and this is equivalent to -375 (answer to #5)
It would be 41*10^2. I get the answer (when it's a short number) by multiplying 10 by10 and keep going on until I think I found the number and multiply it by that number. 10*10=100*41=4100
Hope this helps! :)