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valentina_108 [34]
3 years ago
11

Define variable in mathematics

Mathematics
2 answers:
denis23 [38]3 years ago
8 0

Variable is the unknown value

Shtirlitz [24]3 years ago
6 0

Answer:

A letter to describe a unknown number in an equation

Step-by-step explanation:

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9-(6x+1)=3x+8 what is it thank you
Jobisdone [24]

Answer:

0=x

Step-by-step explanation:

9-(6x+1)=3x+8

9-6x-1=3x+8

9-8-1=3x+6x

9-9=9x

0=9x

0÷9=x

0=x

5 0
3 years ago
Please help me out with this question
sleet_krkn [62]

Answer:

0.31%

Step-by-step explanation:

Just look at the graph my man

5 0
3 years ago
A theater has 30 seats in the first row, 33 seats in the second row, 36 seats in the third row, and so on in the same increasing
Ghella [55]

The answer is A. 765

4 0
3 years ago
Write the ratio of height of the building to the number of floors.​ Then, find the unit​ rate, and explain what it means in this
kicyunya [14]

Answer:

144:9

16

16 ft high

Step-by-step explanation:

Easy...could also be written as 144/9 or 144 to 9

Divide

Same thing

Hope this helps. Have a nice day

4 0
2 years ago
Read 2 more answers
According to a recent​ survey, the population distribution of number of years of education for​ self-employed individuals in a c
creativ13 [48]

Answer:

a) X: number of years of education

b) Sample mean = 13.5, Sample standard deviation = 0.4

c) Sample mean = 13.5, Sample standard deviation = 0.2

d) Decrease the sample standard deviation

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 13.5 years

Standard deviation,σ = 2.8 years

a) random variable X

X: number of years of education

Central limit theorem:

If large random samples are drawn from population with mean \mu and standard deviation \sigma, then the distribution of sample mean will be normally distributed with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}

b) mean and the standard for a random sample of size 49

\mu_{\bar{x}} = \mu = 13.5\\\\\sigma_{\bar{x}} = \dfrac{\sigma}{\sqrt{n}} = \dfrac{2.8}{\sqrt{49}} = 0.4

c) mean and the standard for a random sample of size 196

\mu_{\bar{x}} = \mu = 13.5\\\\\sigma_{\bar{x}} = \dfrac{\sigma}{\sqrt{n}} = \dfrac{2.8}{\sqrt{196}} = 0.2

d) Effect of increasing n

As the sample size increases, the standard error that is the sample standard deviation decreases. Thus, quadrupling sample size will half the standard deviation.

7 0
3 years ago
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