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Anvisha [2.4K]
3 years ago
12

Word Problems

Mathematics
1 answer:
KiRa [710]3 years ago
5 0

Answer:

1. 2

2. 17

3. 6

4. 36

5. 37

6. 12

Step-by-step explanation:

1. 7-5=2

2. 30x17=510

3. 12x6=72

4. 4x9=36

5. 49-12=37

6. 9 plus 3=12

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The demand for a daily newspaper at a newsstand at a busy intersection is known to be normally distributed with a mean of 150 an
AURORKA [14]

Answer:

171 newspapers.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 150, \sigma = 25

How many newspapers should the newsstand operator order to ensure that he runs short on no more than 20% of days

The number of newspapers must be on the 100-20 = 80th percentile. So this value if X when Z has a pvalue of 0.8. So X when Z = 0.84.

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

0.84 = \frac{X - 150}{25}

X - 150 = 0.84*25

X = 171

So 171 newspapers.

4 0
3 years ago
What is the slope of a line parallel to (y=-3x-6)?
EleoNora [17]
Y equals 4x-2 that is my awnser
4 0
3 years ago
What is the slope for (-11,7),(15,-3)​
soldier1979 [14.2K]
-5/13

Formula: Y2-Y1/X2-X1
4 0
3 years ago
Read 2 more answers
Help with this question
puteri [66]

Answer:

its A!

Step-by-step explanation:

6 0
3 years ago
Pls help what is this as a simplified fraction (thank u Jesus loves u)
Arte-miy333 [17]

Answer:

7.9 or 79/10

Step-by-step explanation:

-12.166 / -1.54

12.166 / 1.54

7.9

4 0
3 years ago
Read 2 more answers
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