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Genrish500 [490]
2 years ago
6

8.9+9.5r=−100.445 what is r? first will be marked brainliest!

Mathematics
2 answers:
dexar [7]2 years ago
8 0

Answer:

Step-by-step explanation:

Begin by isolating the term with the r in it. Do that by subtracting 8.9 from both sides:

9.5r = -110.445 - 8.9 and

9.5r = -119.345  Divide both sides by 9.5 to get

r = -119.345/9.5 and

r = 12.56263158 (or you could leave it as a fraction)

aleksandr82 [10.1K]2 years ago
8 0
The answer is 11.51.


8.9+9.5r=-100.445, so we have to remove the 8.9 by subtracting it from both sides.

9.5r=-109.345, but now we have to get r by itself, so we have to divide both sides by 9.5

r=-11.51
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IgorLugansk [536]

Using the normal distribution, the probability that a worker selected at random makes between $500 and $550 is: 2.15%.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean mu and standard deviation sigma is given by:

Z = (X - mu)/sigma

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given as follows:

mu = 400, sigma = 50

The probability is the <u>p-value of Z when X = 550 subtracted by the p-value of Z when X = 500</u>, hence:

X = 550:

Z = (X - mu)/sigma

Z = (550 - 400)/50

Z = 3

Z = 3 has a p-value of 0.9987.

X = 500:

Z = (X - mu)/sigma

Z = (500 - 400)/50

Z = 2

Z = 2 has a p-value of 0.9772.

0.9987 - 0.9772 = 0.0215 = 2.15% probability.

More can be learned about the normal distribution at brainly.com/question/15181104

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6 0
2 years ago
9 = v + 4/ v +12; solve for v
Sergeu [11.5K]

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<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em>

<em>H</em><em>ope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>you</em><em>.</em><em>.</em><em>.</em>

<em>G</em><em>ood</em><em> </em><em>luck</em><em> </em><em>on</em><em> </em><em>your</em><em> </em><em>assignment</em>

<em>~</em><em>p</em><em>r</em><em>a</em><em>g</em><em>y</em><em>a</em>

7 0
4 years ago
Select 2 options
madreJ [45]

Answer:

(×-5)(×+1)

×^2+×-5×-5

×^2-4×-5

8 0
3 years ago
Read 2 more answers
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