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ella [17]
2 years ago
15

Which best estimate of the sum of 5 1/5 and 8 5/6

Mathematics
1 answer:
Reika [66]2 years ago
7 0

Answer:

14 1/30

Step-by-step explanation:

convert the fractions so that the LCF is the denominator

1/5---->6/30

5/6----->25/30

5 6/30+8 25/30

13 31/30

14 1/30

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Answer:

a. 4.33.

Step-by-step explanation:

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Applying the given data:

s=\sqrt{\frac{0.25*(1-0.25)}{100}}\\s=0.0433

If X is the number of correct responses in 100 guesses, the standard deviation of X is:

\sigma = n*s=100*0.0433\\\sigma = 4.33

The standard deviation of X is 4.33 questions.

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3 years ago
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How can complex fractions be used to solve problems involving ratios
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When you have ratios, and some unknowns, you can create complex fractions from them. Bring them to the same denominator, and solve for x.

Example - we have this proportion:
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In case of more complex fractions it may come in handy.
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