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Svetlanka [38]
3 years ago
6

Use inverse operation to solve the question 2/3z = -4 Z= ?

Mathematics
1 answer:
sweet [91]3 years ago
7 0

Answer:

z=(-6)

Step-by-step explanation:

(2/3)*z=(-4)

2*z=3*(-4) --> We move the 3 from the left to the right part of the equation. It was dividing, so we move it multiplying.

2*z=(-12)

z=(-12)/2 --> It's the inverse case of before. 2 was multiplying, so we move it to the right by dividing it.

z=(-6)

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The Range Rule of Thumb roughly estimates the standard deviation of a data set as​ _______.
maw [93]

Answer:

Option A)

s = \dfrac{\text{Range}}{4}        

Step-by-step explanation:

Range Rule of Thumb

  • The range Rule of thumb states that the range is four times the standard deviation.
  • The standard deviation is a measure of dispersion.

\text{Range = Maximum - Minimum}\\\text{s: Standard Deviation}\\\text{Range rule of Thumb:}\\\text{Range} = 4\times s\\\\s = \dfrac{\text{Maximum - Minimum}}{4}

  • Thus, the correct answer is

s = \dfrac{\text{Range}}{4}

4 0
3 years ago
I need help please???
zimovet [89]

Answer:

(-7 and 3) (-5 and 1) (-3 and -1)

Step-by-step explanation:

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4 0
3 years ago
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GarryVolchara [31]

Answer:

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5 0
3 years ago
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4vir4ik [10]

okay lets foces on question 20. 3/20

all you need to do is times the dinominator into 100 so 20x5=100 and now you have to multipy the same number that you multiplyed the first one by so 3x5=15 so the anwer would be 15/100 and to put that in a decimal you need to see the number on top witch is 15 so your real ANWSER IS   .15

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