2 years ago

Been trying to get help on this for a long time Any help ?

Mathematics

1 answer:

tiny-mole [99]2 years ago

3 0

Answer:

the answer is 10.8 feet because I said so on foenem

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30 children are going on a trip it cost £5 including lunch some children take their own packed lunch they pay only £3 the 30 chi

nikitadnepr [17]

No enough info
you can just say that five brought there own lunch while 19 didnt

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3 years ago

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On a test that has a normal distribution, a score of 19 falls one standard deviation below the mean, and a score of 40 falls two

nexus9112 [7]

Hi there!

We can use the following equation:

$\large\boxed{z = \frac{x-\mu}{\sigma}}$

z = amount of standard deviations away a value is from the mean (z-score)

σ = standard deviation

x = value

μ = mean

Plug in the knowns for both and rearrange to solve for the mean:

$-1 = \frac{19-\mu}{\sigma}\\\\-\sigma = 19 - \mu\\\\ \sigma = -19 + \mu$

Other given:

$2 = \frac{40-\mu}{\sigma}\\\\2\sigma = 40- \mu\\\\ \sigma = 20 - \frac{\mu}{2}$

Set both equal to each other and solve:

$-19 + \mu = 20 - \frac{\mu}{2}\\\\\frac{3\mu}{2} = 39 \\\\3\mu = 78 \\\\\boxed{\mu = 26 }$

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2 years ago

Please help I've been have trouble with it.

kakasveta [241]

It should be Answer D. I hope this helps. I also hope you have a great day!!!

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2 years ago

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What is the graph of y = 3/4x - 3?

bearhunter [10]

Answer:

-4, 3 I think that correct but I'm not sure so sorry if it's not

Step-by-step explanation:

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2 years ago

The Jones Building has 103 floors with 48 windows on each floor. The Smith Building has 112 floors with 44 windows on each floor

inessss [21]

A is right no more. I know that because 103x48=4944 and 122x44=4928 so 4944+4928 =9872 so 9872devided by 16= 224.3636363636364

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