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d1i1m1o1n [39]
2 years ago
7

What is the fill in the blank answers?

Mathematics
1 answer:
Olenka [21]2 years ago
4 0
Think first is Distributive Property
Combine any LIKE TERMS
Isolate the VARIABLE
By using INVERSE
Check your ANSWER
I think these are the answers hope it helps!
You might be interested in
A Government company claims that an average light bulb lasts 270 days. A researcher randomly selects 18 bulbs for testing. The s
Fofino [41]

Answer:

31.92% probability that 18 randomly selected bulbs would have an average life of no more than 260 days

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score 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. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

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.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

In this question, we have that:

\mu = 270, \sigma = 90, n = 18, s = \frac{90}{\sqrt{18}} = 21.2

What is the probability that 18 randomly selected bulbs would have an average life of no more than 260 days?

This is the pvalue of Z when X = 260. So

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

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{260 - 270}{21.2}

Z = -0.47

Z = -0.47 has a pvalue of 0.3192.

31.92% probability that 18 randomly selected bulbs would have an average life of no more than 260 days

5 0
3 years ago
Please help asap!!! i’ll rate you most brainliest
SSSSS [86.1K]
I’m pretty sure it’s D??? But it also could be B I’m sorry :( trying to help as much as possible
6 0
2 years ago
Wrote theses in scientific notation
Veseljchak [2.6K]

Answers:

I can't give you all the answers, because that would be cheating. How ever, I will give you the first 5 answers.

Move the decimal so there is one digit to the left of the decimal point. The places the decimal moved would be the exponent for 10.

  1. 3.456*10^2
  2. 8.89*10^-3
  3. 2.35*10^5
  4. 2.35*10^-2
  5. 3.015⋅0
7 0
3 years ago
Find each sum.<br> 1. 56+ (-56)
Juliette [100K]

Find each sum.

1.  56+ (-56) = 0

The number series 1, 2, 3, 4, 55, 56. Therefore, 1596 is the sum of positive integers.

5 0
2 years ago
4x-5y+2x+4+6+9y+7x+2​
gtnhenbr [62]

Answer:

13x+4y+12

Step-by-step explanation:

Combine all the like terms & then solve:

(4x+2x+7x)+(-5y+9y)+(4+6+2)

13x+4y+12

4 0
2 years ago
Read 2 more answers
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