Its Distributive Property please help lol..

Mathematics

2 answers:

lorasvet [3.4K]3 years ago

5 0

Answer:

I believe your answer will be d = -2/3

Step-by-step explanation:

hope it helps! (sorry im late- cough-)

olasank [31]3 years ago

4 0

Answer:

d= -4

Step-by-step explanation:

First you multiply the 3 by 6. You don't multiply the Coefficient with the variable.

(6x3)+5d = -2

Then you'll get: 18 + 5d = -2

At this point you just subtract from both sides

18 + 5d= -2

-18 -18

This becomes 5d = -20

$\frac{5d}{5}$ = $\frac{-20}{5}$

-20/5 equals -4.

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Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 900

rosijanka [135]

Answer:

The 33 week gestation period baby has a zscore of -0.47.

The 41 week gestation period baby has a zscore of -0.94.

The 41 week gestation period baby weighs less relative to the gestation period.

Step-by-step explanation:

Normal model problems can be solved by the zscore formula.

On a normaly distributed set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a value X is given by:

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

The zscore represents how many standard deviations the value of X is above or below the mean $\mu$ . This means that the baby with the lowest Zscore is the one who weighs relatively less to the gestation period.

33 week gestation period baby:

Babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 900 grams, so $\mu = 2700, \sigma = 900$ .

A 33-week gestation period baby weighs 2275 grams. So $X = 2275$ .

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

$Z = \frac{2275 - 2700}{900}$

$Z = -0.47$

41 week gestation period baby:

Babies born after a gestation period of 40 weeks have a mean weight of 3200 grams and a standard deviation of 450 grams, so $\mu = 3200, \sigma = 450$