$81.40-$9.00=$72.40
$72.40/.4 (cents)= 181 minutes
<span>3.60555128 is the awnser</span>
A ruler to measure the length of an object.
Let's say Bailey takes "b" days to paint it.
and Andrew takes "a" days to paint the same house.
now, Andrew is 6 times faster than Bailey, therefore, if Andrew takes "a" days to do it, Bailey takes then "6a" days, or b = 6a.
now, the year they worked together, they finished it in 7 days.
so, after 1 day then, they have only done 1/7 of the whole work.
and Andrew for one day, has done 1/a of the house, whilst Bailey has done 1/b of the house or 1/(6a).
![\bf \stackrel{\textit{Andrew's rate}}{\cfrac{1}{a}}+\stackrel{\textit{Bailey's rate}}{\cfrac{1}{b}}=\stackrel{\textit{1 day of work}}{\cfrac{1}{7}} \\\\\\ \cfrac{1}{a}+\cfrac{1}{6a}=\cfrac{1}{7}\impliedby \begin{array}{llll} \textit{let's multiply all by }\stackrel{LCD}{42a}\textit{ to toss the}\\ denominators \end{array}](https://tex.z-dn.net/?f=%5Cbf%20%5Cstackrel%7B%5Ctextit%7BAndrew%27s%20rate%7D%7D%7B%5Ccfrac%7B1%7D%7Ba%7D%7D%2B%5Cstackrel%7B%5Ctextit%7BBailey%27s%20rate%7D%7D%7B%5Ccfrac%7B1%7D%7Bb%7D%7D%3D%5Cstackrel%7B%5Ctextit%7B1%20day%20of%20work%7D%7D%7B%5Ccfrac%7B1%7D%7B7%7D%7D%0A%5C%5C%5C%5C%5C%5C%0A%5Ccfrac%7B1%7D%7Ba%7D%2B%5Ccfrac%7B1%7D%7B6a%7D%3D%5Ccfrac%7B1%7D%7B7%7D%5Cimpliedby%20%0A%5Cbegin%7Barray%7D%7Bllll%7D%0A%5Ctextit%7Blet%27s%20multiply%20all%20by%20%7D%5Cstackrel%7BLCD%7D%7B42a%7D%5Ctextit%7B%20to%20toss%20the%7D%5C%5C%0Adenominators%0A%5Cend%7Barray%7D)