Remember that X will always be one up or down depending on if there is a - or not (if it is just an x) and one over! Hope this helps
13(10 + 2) could be used to simplify which of the following problems?
1 answer:
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If Nate paints the wall in 4 hours, it means that he can paint 1/4 of the wall every hour.
Similarly, if Jill paints the wall in 7 hours, it means that he can paint 1/7 of the wall in one hour.
So, together, they paint the following fraction of the wall in one hour:
.
At this rate, they need 28/11 hours to paint the whole wall, in fact, after that amount of time they paint
i.e. the whole wall