What does this equal

Mathematics

1 answer:

docker41 [41]4 years ago

8 0

Answer:

I think it is 9

Step-by-step explanation:

3×3 is 9 + 15= 24÷4=3×3=9

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What would be the answer to this and how you got the answer -3-6(4×+6)>-111

Alisiya [41]

Answer:

x< 3

Step-by-step explanation:

first you do the things between ( )

but here you can't change anything between te ( )

then you do the multiplying and dividing

so in this case you get

-3-24x-36>-111

then you do + and -

so in this case you get

-24x - 39 > -111

then you want to get the x so you bring everything without an x to the other side

here you get

-24 x > -111+ 39

-24x> -72

then you separate the x completely

so you get

x<-72/-24

x< 3

above you changed the > to an < because you divide with a negative number

7 0

3 years ago

Halloween Candy Halloween is Kelly's favorite holiday of the year! Based on experience, Kelly knows that on average, each house

LuckyWell [14K]

Using the normal distribution and the central limit theorem, it is found that there is an approximately 0% probability that the total number of candies Kelly will receive this year is smaller than last year.

Normal Probability Distribution

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

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

It 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, which is the percentile of X.
By the Central Limit Theorem, for n instances of a normal variable, the mean is $n\mu$ while the standard deviation is $s = \sigma\sqrt{n}$ .

In this problem:

Mean of 4 candies, hence $\mu = 4$ .
Standard deviation of 1.5 candies, hence $\sigma = 1.5$ .
She visited 35 houses, hence $n = 35, \mu = 35(4) = 140, s = 1.5\sqrt{4} = 3$