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3 years ago

How do you know that 21 over 30 is greater than 2 over 3

1 answer:

7 0

The problem deals with fractions comparison, lets do it:
21/30 > 2/3
we begin solving:
21 > (2/3)*30
21 > 2*10
21 > 20
therefore the proposed inequality is true, 21/30 > 2/3

You can solve as well getting same denominator for both fractions and comparing directly, in this case we need to get 2/3 to be divided by 30:
2/3 = (10/10)(2/3) = 20/30
So we have:
21/30 > 2/3
which is equal to:
21/30 > 20/30
and we compare directly because both fractions are divided by the same number, and we can see that the inequality is true.

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2 years ago

Read 2 more answers

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Explanation

Suppose, they need to work for $x$ minutes more in order to have packed the same number of boxes.

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So, the number of boxes packed by Selma in that $x$ minutes $=\frac{x}{5}$ and the number of boxes packed by Trudy in $x$ minutes $=\frac{x}{7}$

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3 years ago

what is the correct way to write three hundred nine million, fifty-eight thousand, three hundred four?

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-- pen held loosely and comfortably in your hand

-- forearm resting lightly on the table

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