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White raven [17]
2 years ago
15

multiply me by four then subtract 13 if you divide me by three and add 17 you get 10 what number am I

Mathematics
1 answer:
siniylev [52]2 years ago
9 0
I think ur answer will be -37.35
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How many feet of fencing would a farmer need if she wanted
Sauron [17]

Answer:

Well, it's the perimeter, so...40.

You just calculate the perimeter of a rectangle with the lenght of 12 and width of 8, by the formula

P = 2L+2W

or you can factor it out.

7 0
3 years ago
- 2a + 5b - 3c + 2a + b
kifflom [539]
The answer would be 6b-3c because a would cancel out and be 0
6 0
2 years ago
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Each contestant in the Hunger Games must be trained to compete. Suppose that the time it takes to train a contestant has mean 5
LiRa [457]

Answer:

11.51% probability that it will take less than 450 days to train all the contestants.

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 the sum of n variables, the mean is \mu*n and the standard deviation is s = \sigma\sqrt{n}

In this question:

n = 100, \mu = 100*5 = 500, s = 4\sqrt{100} = 40

Approximate the probability that it will take less than 450 days to train all the contestants.

This is the pvalue of Z when X = 450.

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

By the Central Limit Theorem

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

Z = \frac{450 - 500}{40}

Z = -1.2

Z = -1.2 has a pvalue of 0.1151

11.51% probability that it will take less than 450 days to train all the contestants.

8 0
3 years ago
Jimmy gets a discount of 35% for a pair of sneakers with an original price of $70 he also gets a discount of 25% on a shirt with
Fed [463]

Answer:

$32.00

Step-by-step explanation:

$70 X .35 = $24.50 sneaker discount

$30 X .25 = $7.50 shirt discount

$24.50 + $7.50 = $32.00

5 0
3 years ago
An Item has a listed price of $30. If the sales tax rate is 5%, how much is the sales tax (in doll
DochEvi [55]

Answer:

sales tax is 1.5

Step-by-step explanation:

4 0
3 years ago
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