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Lena [83]
3 years ago
11

How many terms are in this expression 3x2y4z − 6xy − 3z(5x2)

Mathematics
2 answers:
Liono4ka [1.6K]3 years ago
8 0

Answer:C 3 Term

Step-by-step explanation:

Stels [109]3 years ago
3 0

Answer:

c

Step-by-step explanation:

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35% of 60 = 21

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To add a value 1 to variable x, you write ________.
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The number of accidents per week at a hazardous intersection varies with mean 2.2 and standard deviation 1.1. This distribution
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Step-by-step explanation:

Hello!

The definition of the Central Limi Theorem states that:

Be a population with probability function f(X;μ,δ²) from which a random sample of size n is selected. Then the distribution of the sample mean tends to the normal distribution with mean μ and variance δ²/n when the sample size tends to infinity.

As a rule, a sample of size greater than or equal to 30 is considered sufficient to apply the theorem and use the approximation.

X[bar]≈N(μ;σ²/n)

If the variable of interest is X: the number of accidents per week at a hazardous intersection.

There is no information about the distribution of this variable, but a sample of n= 52 weeks was taken, and since the sample is large enough you can approximate the distribution of the sample mean to normal. With population mean μ= 2.2 and standard deviation σ/√n= 1.1/√52= 0.15

I hope it helps!

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3 years ago
Rachel had a popcorn machine at her party. Determine whether the relationship between time and the amount of popcorn popped is d
daser333 [38]
The relationship between time and amount of popcorn popped is proportional.
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In a recent telephone survey, 5,000 randomly selected teenagers were asked to cite their primary social network sites. Six of 10
aleksklad [387]

Answer:

b. There is a 95% chance that the true proportion of teenagers who use Mybook as their primary social network site is in the interval (0.2964, 0.9036).

Step-by-step explanation:

Hello!

In general, a 95% confidence interval for the population proportion can be interpreted as: There is a 95% chance (or confidence) that the interval will contain the true value of the proportion.

(Remember the confidence level of 95% means that if you were to make 100 intervals for the population proportion, 95 of them will contain its true value)

The estimated parameter is the population proportion of teenagers that use Mybook as their primary social network site.

With this in mind then you can say that there is a 95% probability that the interval (0.2964, 0.9036) will contain the true value of the proportion of teenagers that use Mybook as their primary social network site.

The correct answer is: b

I hope this helps!

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