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solong [7]
3 years ago
13

What's 9/10 minus 2/5

Mathematics
2 answers:
natka813 [3]3 years ago
8 0
9/10-2/5= 9/10-4/10=5/10=1/2
nydimaria [60]3 years ago
4 0
2/5 is equal to 4/10 Keep the 9/10 And subtract to get 5/10 You can reduce it to 1/2
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A line has a slope of 1 and passes through the point (-8, -7). What is its equation in
AlekseyPX

Answer: y = x + 1

Step-by-step explanation:

y = 1x + c

-7 = 1(-8) + c

-7 = -8 + c

-7 + 8 = c

1 = c

y = 1x + 1 or

y = x + 1

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3 years ago
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In a sample of 115 115 curtains, the average length was found to be 32.2in. 32.2 ⁢ in. With a standard deviation of 0.8 0.8 . Gi
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Answer:

The point estimate for the population standard deviation of the length of the curtains is 8.58in.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

s = 0.8, n = 115

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s = \frac{\sigma}{\sqrt{n}}

\sigma = s\sqrt{n}

\sigma = 0.8\sqrt{115}

\sigma = 8.58

The point estimate for the population standard deviation of the length of the curtains is 8.58in.

3 0
3 years ago
X7=−0.21 helllllllllllllllllllllllllllppppp
Anastasy [175]
The answer is x= -0.03
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