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3 years ago

Write the 3-digit number that answers the riddle.

1 answer:

5 0

454 <== ur number

same hundreds digit as ones digit...yep
value of tens digit is 50...yep
value of ones digit is 4...yep

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Which value of w is the solution to the question? 2w-5=w+10

Gekata [30.6K]

Answer:

w = 15

Step-by-step explanation:

2w - w = 10+5

w = 15

simple!

5 0

3 years ago

What is the value of x when y=47 y=0.8x-17 PLS HELP ASAP

prohojiy [21]

Y= 0.8x - 17

x= (y+17)/0.8

substituting y= 47 in the equation

x= (47+17)/0.8
x= 64/0.8

x=80

4 0

4 years ago

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Please help n-(-8)=-2

inna [77]

I think that the value of n is -10

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4 years ago

Which is a positively skewed distribution?

Alona [7]

Answer:

to me it looks like B but i could be wrong

Step-by-step explanation:

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3 years ago

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A researcher is interested in estimating the mean blood alcohol content of people arrested for driving under the influence. Base

UNO [17]

Answer:

We need a sample size of at least 650

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem:

We need a sample of size at least n

n is found when $M = 0.005, \sigma = 0.065$

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.005 = 1.96*\frac{0.065}{\sqrt{n}}$

$0.005\sqrt{n} = 1.96*0.065$

$\sqrt{n} = \frac{1.96*0.065}{0.005}$

$(\sqrt{n})^{2} = (\frac{1.96*0.065}{0.005})^{2}$

$n = 649.23$

Rounding up

We need a sample size of at least 650

7 0

3 years ago