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Ivan
2 years ago
9

Simplify- 9 (1 - r) + 3r

Mathematics
1 answer:
LUCKY_DIMON [66]2 years ago
8 0

Answer:

Step-by-step explanation:

Hello

Simplify :

9 (1 - r) + 3r

= 9 - 9r + 3r

= 9 - 6r

= 3(3 - 2r)

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In a hospital, there are 250 registered nurses. 100 of the nurses are males. What is the ratio of male nurses to female nurses i
Dimas [21]

Answer:

The ratio of male nurses to female nurse in lowest terms is: 2:5

Step-by-step explanation:

Given: In a hospital, there are  total 250 registered nurses.

Number of nurses are males = 100

Number of nurses are females = 250 - 100 = 150  [ Total nurses - number of male nurses]

To find the ratio of male nurse to female nurses in lowest terms;

A ratio shows that the relative sizes of two or more values.

Then,

\frac{Number of male nurses}{Number of female nurses} = \frac{100}{250}

or

= \frac{100}{250} =\frac{10}{25} =\frac{2}{5} = 2:5

Therefore, the ratio of male nurses to female nurses in lowest terms is; 2 :5

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2 years ago
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What is 14.9 divided by 0.02
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The answer is 745. Doesn't math make sense ?
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ABC is translated 6 units up and 3 units left to crest A’B’C’. If vertex A is at (-1,2) and vertex B is at (1, 5) then vertex A’
jekas [21]

The translation is

... (x, y) ⇒ (x -3, y +6) . . . . . 3 units left, 6 units up

Then

... A(-1, 2) ⇒ A'(-1-3, 2+6) = A'(-4, 8)

... B(1, 5) ⇒ B'(1 -3, 5 +6) = B'(-2, 11)

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Mohan is 6 years older than Rohan. The sum of their ages is 20. Find their present ages​
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Answer: ??????

Step-by-step explanation:

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2 years ago
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Find the z value such that the area under the standard normal distribution curve between 0 and z value is 0.3962 or 39.62%.
FinnZ [79.3K]

Using the normal distribution, it is found that z is Z = 1.26, given by option B.

------------------

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X, which is also the <u>area under the normal curve to the left of Z</u>. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X, which is also the <u>area under the normal curve to the right of Z</u>.

------------------

  • Area under the normal curve between 0 and the z-value is 0.3962.
  • Z = 0 has a p-value of 0.5.
  • Thus, we need to find z with a p-value of 0.5 + 0.3962 = 0.8962.
  • Looking at the z-table, this is Z = 1.26, given by option B.

A similar problem is given at brainly.com/question/22940416

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