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allochka39001 [22]
3 years ago
11

Need help with this question ASAP.

Mathematics
2 answers:
Rainbow [258]3 years ago
6 0

Answer:

7=x

Step-by-step explanation:

Equation

4x = 7(x - 3)

we apply distributive property c(b+a)= bc+ac

4x = 7x - 21

Group similar terms

21=7x-4x

Resolve addition / subtraction operations

21=3x

clear the x. Dividing both terms by the coefficient that accompanies the x

\frac{21}{3}=\frac{3x}{3}

7=x

saw5 [17]3 years ago
3 0
Your answers all seem correct.
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romanna [79]

Answer: The p-value is 0.154.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis :

H_0:\mu=20

Alternate hypothesis :

H_1:\mu

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Sample mean = 18.5 hours

Sample standard deviation = 4.3 hours

Sample size n = 35

So, test statistic would be

z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{18.5-20}{\dfrac{4.3}{\sqrt{35}}}\\\\z=\dfrac{-1.5}{0.726}\\\\z=-2.066

So, the  p value would be 0.154.

Hence, the p-value is 0.154.

4 0
3 years ago
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larisa86 [58]

Answer:

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Step-by-step explanation:

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3 years ago
Find the largest rational number r for which 5r ≤ 33.
soldier1979 [14.2K]

Answer:

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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3 0
3 years ago
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