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Serjik [45]
3 years ago
6

What is 4 3/4 + 6 5/6

Mathematics
2 answers:
frutty [35]3 years ago
5 0

The answer to the problem would be 10 19/12 (Improper Fraction) or 11 7/12 (Proper Fraction).

To start, you would want to make both fractions on each whole number have the same denominator by finding the least common multiple, in this case it is 12.

To change the denominator in the fraction 3/4, you would multiple the denominator by 3 to make it 12, and what you do to the bottom you must do to the top ( multiple the numerator by 3 as well ), making it 9/12.

To make the denominator 12 in the fraction 5/6, simply multiple the denominator by 2 to make it 12, and the numerator by 2 as well to make it 10, making it 10/12.

Solve the new equation:

4 9/12 + 6 10/12 =

10 19/12 (Improper Fraction) or 11 7/12 (Proper Fraction).

STatiana [176]3 years ago
3 0
139 over 12 is the answer
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Step-by-step explanation:

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The I added 8+8 and that was 16.

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1/2×63/π=<u>63/2π</u>

       

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The reading speed of second grade students in a large city is approximately normal, with a mean of 90 words per
kari74 [83]

Answer:

The probability that a random sample of 10 second grade students from     the city results in a mean  reading rate of more than 96 words per minute

P(x⁻>96) =0.0359

Step-by-step explanation:

<em>Explanation</em>:-

<em>Given sample size 'n' =10</em>

<em>mean of the Population = 90 words per minute</em>

<em>standard deviation of the Population =10 wpm </em>

<em>we will use formula</em>

<em>                            </em>Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }<em></em>

<em>Let X⁻  = 96</em>

                           Z = \frac{96-90 }{\frac{10}{\sqrt{10} } }

                          Z =  1.898

<em>The probability that a random sample of 10 second grade students from     the city results in a mean  reading rate of more than 96 words per minute</em>

<em></em>P(X^{-}>x^{-} ) = P(Z > z^{-} )<em></em>

<em>                    = 1- P( Z ≤z⁻)</em>

<em>                    = 1- P(Z<1.898)</em>

                   = 1-(0.5 +A(1.898)

                   = 0.5 - A(1.898)

                   = 0.5 -0.4641 (From Normal table)

                  = 0.0359

<u><em>Final answer</em></u>:-

The probability that a random sample of 10 second grade students from  

                = 0.0359

4 0
3 years ago
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