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3 years ago

7

What value of n makes this expression equal to 6?

2 answers:

juin [17]3 years ago

7 0

B or 4
2+4= 6
then you do
3 x 4=12
then you do
12-6=6

Leno4ka [110]3 years ago

4 0

<span>3n - (2 + n)
Substitute 4 for variables
3(4) - (2+4)
Combine like terms
12 - 6
Subtract
Final Answer: 6

And so the correct answer would be B. 4.</span>

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Please help me I’m very confused

solmaris [256]

Answer:

74

Step-by-step explanation:

74 divided by 2 is 37. 37 minus 10 is 27

7 0

3 years ago

What is 1/8 divided by 1/2

vladimir1956 [14]

1/8÷1/2
You flip the second one and change it to multiplication:
1/8×2/1=2/8
2/8 can be simplified by dividing both sides by 2:
1/4

Hope this helps :)

4 0

4 years ago

Last year 500 people attended a concert this year 900 people attended what was the percent increase in attendance from last year

IRISSAK [1]

Answer:

80

Step-by-step explanation:

500 to 900? = 80.

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3 years ago

A simple random sample of size nequals81 is obtained from a population with mu equals 83 and sigma equals 27. (a) Describe the

Ivanshal [37]

Answer:

a) $\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})$

With:

$\mu_{\bar X}= 83$

$\sigma_{\bar X}=\frac{27}{\sqrt{81}}= 3$

b) $z= \frac{89-83}{\frac{27}{\sqrt{81}}}= 2$

$P(Z>2) = 1-P(Z$

c) $z= \frac{75.65-83}{\frac{27}{\sqrt{81}}}= -2.45$

$P(Z$

d) $z= \frac{89.3-83}{\frac{27}{\sqrt{81}}}= 2.1$

$z= \frac{79.4-83}{\frac{27}{\sqrt{81}}}= -1.2$

$P(-1.2$

Step-by-step explanation:

For this case we know the following propoertis for the random variable X

$\mu = 83, \sigma = 27$

We select a sample size of n = 81

Part a

Since the sample size is large enough we can use the central limit distribution and the distribution for the sampel mean on this case would be:

$\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})$

With:

$\mu_{\bar X}= 83$

$\sigma_{\bar X}=\frac{27}{\sqrt{81}}= 3$

Part b

We want this probability:

$P(\bar X>89)$

We can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for 89 we got:

$z= \frac{89-83}{\frac{27}{\sqrt{81}}}= 2$

$P(Z>2) = 1-P(Z$

Part c

$P(\bar X$

We can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for 75.65 we got:

$z= \frac{75.65-83}{\frac{27}{\sqrt{81}}}= -2.45$

$P(Z$

Part d

We want this probability:

$P(79.4 < \bar X < 89.3)$

We find the z scores:

$z= \frac{89.3-83}{\frac{27}{\sqrt{81}}}= 2.1$

$z= \frac{79.4-83}{\frac{27}{\sqrt{81}}}= -1.2$

$P(-1.2$

8 0

4 years ago

What is the slope for 4y-2x=8

oksian1 [2.3K]

Answer:

1/2

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers