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11Alexandr11 [23.1K]
3 years ago
10

Which expression has the greatest value |-21|, |14|, |30|, |-45|

Mathematics
1 answer:
tresset_1 [31]3 years ago
3 0

Answer:

|-45|

Step-by-step explanation:

In mathematics, the absolute value of a real number is the numeric value of the  number, regardless the sign, either this is positive or negative.

The absolute value function can be definied as:

  • |a|=a si a ≥0
  • |a|=-a si a <0

Using this definition, we have:

|-21| = -(-21) = 21

|14| = 14

|30| = 30

|-45| = -(-45) = 45

Therefore, the expression |-45| has the greatest value.

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(2/5 + 3/4) x [ 3 - (1/4 : 1/5)]
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Answer & Step-by-step explanation:

(2/5 + 3/4) * [ 3 - (1/4 : 1/5)]

When you see this sign, : , it usually means to divide the numbers because they represent some form of a ratio. So, we will divide 1/4 by 1/5.

First, do all of the operations in the parentheses ().

(2/5 + 3/4)*[ 3 - (1/4 : 1/5)]

(23/20) * [ 3 - (5/4)]

(23/20) * (7/4)

Now, we multiply 23/20 by 7/4.

(23/20) * (7/4)

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This number can not be simplified so we will keep it as it is.

So, the answer to this expression is 161/80

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3 years ago
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Answer:

Step-by-step explanation:

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Answer:

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