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suter [353]
3 years ago
7

#11 PLEASE (11 points)

Mathematics
1 answer:
Shalnov [3]3 years ago
3 0
If we expand -7x ( 5 - x ) ..
.....we have to multiply the outside term with the inside values

there fore if we multiply 7 and 5 the answer is 35....... and the negative symbol will make it negative so it will be -35 and the x in the outside value will be multiplied to it so it will become -35x.....

then if we multiply -7x and -x ...... - sign and the other - sign when multiplied will make + sign
and when x and x are multiplied from both sides it comes as x^2 ( this means x squared )........when 7 is multiplied the final answer will be 7x^2.......

so we will have -35x + 7x^2
SO when this will be arranged in descending order it means from biggest to smallest....so this will be 7x^2 - 35 x

HOPE IT HELPED !!!
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Step-by-step explanation:

The easiest common denominator to find is the product of the denominators you have.

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The difference is ...

  \dfrac{5}{6}-\dfrac{1}{8}=\dfrac{5}{6}\cdot\dfrac{8}{8}-\dfrac{1}{8}\cdot\dfrac{6}{6}\\\\=\dfrac{40-6}{48}=\boxed{\dfrac{34}{48}}

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<em>Additional comment</em>

The difference numerator and denominator have a common factor of 2, so can be reduced to 17/24. The denominator 24 could have been used as the common denominator from the start.

  5/6 -1/8 = 20/24 -3/24 = 17/24 . . . . reduced result

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Using the <em>least common denominator</em> does not always result in a reduced sum or difference. If some other denominator is used (as here), then you can be assured that the result will need to be reduced to get to lowest terms.

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