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mash [69]
3 years ago
9

Cynthia ran 4 laps in 40 minutes. Which ratio represents the number of laps ran to minutes?

Mathematics
1 answer:
poizon [28]3 years ago
4 0
4:40 simplifies into 1:10
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a plastering contractor charges $18 per square yard( that is $2 per square foot). what is the cost of plastering 100 feet of wal
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Basically, this problem is going to require you to solve for the area and multiply it with the given cost unit.

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puteri [66]

Answer:

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3 years ago
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11Alexandr11 [23.1K]
A perfect square must be hidden within all of those radicands in order to simplify them down to what the answer is.  \sqrt{192}= \sqrt{64*3}= 8\sqrt{3}.  \sqrt{80}= \sqrt{16*5}=4 \sqrt{5}.  \sqrt{12288}= \sqrt{4096*3}=64 \sqrt{3}.  The rules for adding radicals is that the index has to be the same (all of our indexes are 2 since we have square roots), and the radicands have to be the same.  In other words, we cannot add the square root of 4 to the square root of 5.  They either both have to be 4 or they both have to be 5.  So here's what we have thus far: 8 \sqrt{3}+4 \sqrt{5}+64 \sqrt{3}.  We can add 8 \sqrt{3} and 64 \sqrt{3} to get 72 \sqrt{3}.  That means as far as our answer goes, A = 72 and B = 4, or (72, 4), choice a.
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