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4 years ago

PLEASE HELP ITZ URGENTOO!!!!

Mathematics

1 answer:

lesya692 [45]4 years ago

8 0

Answer: The solution set of the system of inequalities is the region above the dashed line (y=-2x-2) and below the solid line (y=x+4).

Please, see the attached graph.

Thanks.

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What is the slope of the line on the graph?<br> need answer asap pls help

vlada-n [284]

Answer:

-2/6

Step-by-step explanation:

go down the y axis 2 times (-2) and over 6

y=-2/6x+4

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2 years ago

The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 270 day

dusya [7]

Answer:

a) 281 days.

b) 255 days

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:

$\mu = 270, \sigma = 8$

(a) What is the minimum pregnancy length that can be in the top 8% of pregnancy lengths?

100 - 8 = 92th percentile.

X when Z has a pvalue of 0.92. So X when Z = 1.405.

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

$1.405 = \frac{X - 270}{8}$

$X - 270 = 1.405*8$

$X = 281$

(b) What is the maximum pregnancy length that can be in the bottom 3% of pregnancy lengths?

3rd percentile.

X when Z has a pvalue of 0.03. So X when Z = -1.88

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

$-1.88 = \frac{X - 270}{8}$

$X - 270 = -1.88*8$

$X = 255$

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4 years ago

What is 1675 divided by 25 with remainder?

attashe74 [19]

Answer:

975

Step-by-step explanation:

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3 years ago

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3 years ago

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