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dybincka [34]
3 years ago
7

7x -3(2x + 1) = 5-3x

Mathematics
2 answers:
Damm [24]3 years ago
7 0

Answer:

2

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

7x−3(2x+1)=5−3x

7x+(−3)(2x)+(−3)(1)=5+−3x(Distribute)

7x+−6x+−3=5+−3x

(7x+−6x)+(−3)=−3x+5(Combine Like Terms)

x+−3=−3x+5

x−3=−3x+5

Step 2: Add 3x to both sides.

x−3+3x=−3x+5+3x

4x−3=5

Step 3: Add 3 to both sides.

4x−3+3=5+3

4x=8

Step 4: Divide both sides by 4.

4x

4

=

8

4

x=2

Hoped I helped -

Sleepy~

zavuch27 [327]3 years ago
6 0

Answer:x=2

Step-by-step explanation:

Don’t have to write it all out but if you check it with the equation is works.

Both sides with equal -1 is x is 2.

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A simple random sample of 50 items from a population with 7 resulted in a sample mean of 35.
Vilka [71]

The 90% , 99% confidence interval for the population mean is 32.145 < \rm \mu < 35.855 and 31.093 <  \rm \mu < 36.907

<h3>What is Probability ?</h3>

Probability is the study of likeliness of an event to happen.

It is given that

Total Population = 50

Mean = 35

The confidence interval is given by

\rm CI = \mu + z \dfrac{s}{\sqrt n}

\rm \mu is the mean

z is the confidence level value

s is the standard deviation

n is the population width

(a) The 90% confidence interval for the population mean

90% \rm \alpha / 2  = 0.05

Z = 1.64

34 \rm \pm 1.64 * 8 / √50

34 \rm \pm  1.855

32.145 < \rm \mu < 35.855

(b)  The 99% confidence interval for the population mean

99% \rm \alpha / 2  = 0.005

Z=2.57

34  \rm \pm 2.57 * 8 / √50

34 \rm \pm  2.907

31.093 <  \rm \mu < 36.907

Therefore the confidence interval for population mean has been determined.

The complete question is

A simple random sample of 50 items from a population width =7  resulted in a sample mean of 35. If required, round your answers to two decimal places.

a. Provide a 90% confidence interval for the population mean

b. Provide a 99% confidence interval for the population mean

To know more about Probability

brainly.com/question/11234923

#SPJ1

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