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mamaluj [8]
3 years ago
13

Five times the sum of a number and 27 is greater than or equal to six times the sum of that number and 26

Mathematics
1 answer:
arsen [322]3 years ago
7 0

So, let's say the number is x.

5(x + 27) ≥ 6( x + 26)

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John wants to make cookies. To make cookies, he need 2 over 3 of a cup of flour per batch of cookies. If John has 4 cups of flou
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\dfrac{2}{3} \text { cups = } 1 \text { batch}

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4 \text { cups = } \dfrac{3}{2} \times 4 \text { batch}

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3 years ago
Can anybody explain how to subtract mixed fractions?
Ilya [14]

Answer:

  • <em>convert </em>the mixed fractions to improper fractions (where the numerator is greater than or equal to the denominator): multiply the whole number part by the fraction's denominator, add that to the numerator, write the result on top of the denominator.
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  • convert back to mixed fractions by dividing the numerator by the denominator, write down the whole number answer, write down the remainder above the denominator.

Example

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convert to improper fractions:

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common denominator = 3 × 5 = 15, so:

\dfrac{11}{3}-\dfrac{9}{5}=\dfrac{11\times 5}{3\times 5}-\dfrac{9\times 3}{5\times 3}=\dfrac{55}{15}-\dfrac{27}{15}

subtract:

\dfrac{55}{15}-\dfrac{27}{15}=\dfrac{55-27}{15}=\dfrac{28}{15}

convert back to mixed fractions:

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