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Serggg [28]
3 years ago
14

Charles bought 7/8 foot of electrical wire and 5/6 foot of copper wire for his science project. What is the least common denomin

ator of the fraction?
Mathematics
2 answers:
katovenus [111]3 years ago
8 0
The least common denominator is 24. That is the smallest possible number that has 6 and 8 as factors. So if you wanted to add those together it would be:
21/24 + 20/24 = 41/24 ft
alisha [4.7K]3 years ago
7 0
The least common denominator is 24. 
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Answer:

  yes, there are an infinite number of solutions

Step-by-step explanation:

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3 years ago
Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite
yarga [219]

Answer:

<em>Rajan must use </em><em>0.75</em><em> liters of 5% hydrochloric acid solution and </em><em>0.25</em><em> liters of 45% hydrochloric acid solution.</em>

Step-by-step explanation:

Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

x+y=1

i.e x=1-y --------------------1

As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so

0.05x+0.45y=1\times 0.15

i.e 5x+45y=15 -------------2

Putting value of x from equation 1 in equation 2,

\Rightarrow 5(1-y)+45y=15

\Rightarrow 5-5y+45y=15

\Rightarrow 5+40y=15

\Rightarrow 40y=15-5=10

\Rightarrow y=0.25

Putting the value of y in equation 1,

x=1-0.25=0.75

Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters of 45% hydrochloric acid solution.

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I'm assuming you mean a compression of factor 6

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3 years ago
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