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son4ous [18]
2 years ago
13

Which expressions are equal to 0 when x = -1? Check all that apply.

Mathematics
1 answer:
lukranit [14]2 years ago
3 0

Answer:

4(x + 1) and 4(x - (-1))

Step-by-step explanation:

4(-1 + 1) = 4(0) = 0

(4 (-1) + 5) = -4 +5 = -1

4(-1 - 1) = 4(-2) = -8

(5 - 4(-1)) = 5 + 4 = 9

4(-1 - (-1)) = 4(0) = 0

4 (-1 + (-1)) = 4(-2) = 8

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Answer:

The relative frequency is found by dividing the class frequencies by the total number of observations

Step-by-step explanation:

Relative frequency measures how often a value appears relative to the sum of the total values.

An example of how relative frequency is calculated

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21 - 40                               15                               15 / 50 = 0.3

41 - 60                               10                               10 / 50 = 0.2

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81 - 100                             <u> 10</u>                                10 / 50 = <u>0.2</u>

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From the above example, it can be seen that :

  1. two or more classes  can have the same relative frequency
  2. The relative frequency is found by dividing the class frequencies by the total number of observations.
  3. The sum of the relative frequencies must be equal to one
  4. The sum of the frequencies and not the relative frequencies is equal to the number of observations.

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