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zmey [24]
3 years ago
15

My home work says to solve this 9 3 2 1 =1

Mathematics
2 answers:
Norma-Jean [14]3 years ago
7 0
9 divided by 3 is 3

3 minus 2 is 1

1 divides by 1 is 1


9/3=3
3-2=1
1/1=1


I hope this helped
ZanzabumX [31]3 years ago
3 0

I assume this is one of those "put operators in the right places to make this true" questions. Here's one solution:

9 ÷ 3 - 2 × 1 = 3 - 2 × 1 = 1 × 1 = 1

Really, most of these problems can be tackled by experimentation - you kind of have to develop a "feel" for these numbers and operations, and with enough experience, these kinds of things will just start coming naturally to you.

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Joe can cut and split a cord of firewood in 3 fewer hours than Dwight can. When they work​ together, it takes them 2 hours. How
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Dwight will take 6 hours to finish the job alone and Joe will take 3 hours to finish the job alone.

Step-by-step explanation:

Let us assume the time taken by Dwight to split a cord of firewood  = K hrs

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As, Joe uses 3 LESS hours then Dwight.

So, the time taken by Joe to split a cord of firewood  = (K- 3) hrs

So, the per hour rate of Joe  = (\frac{1}{K-3})

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So, the per hour rate of BOTH of them  = (\frac{1}{2})

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Now, solving for the value of K , we get:

(\frac{1}{K}) +  (\frac{1}{K-3}) = (\frac{1}{2})\\\implies  \frac{(K-3) + K}{K (K-3)}  = (\frac{1}{2})\\\implies 2(2K -3) = K^2 - 3K\\\implies k^2 - 3K -4K +6 = 0\\\implies K^2 - 7K  + 6=  0\\\implies K^2 - 6K - K  + 6=  0\\\implies K(K-6) -1(K - 6)=  0\\\implies (K-6)(K-1) = 0

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⇒ K  = 6 hours

Hence, Dwight will take 6 hours to finish the job alone and Joe will take (k-3) = (6-3) = 3 hours to finish the job alone.

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