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2 years ago

5(1+4K)+7k=4(7k+2) Help

Mathematics

1 answer:

stepladder [879]2 years ago

5 0

Answer:

k = -3

Step-by-step explanation:

1) Simplify

5+20k+7k=28k+8

2) Combine the k's

5+27k=28k+8

3) Subtract 27k on both sides

5=k+8

4) Subtract 8 on both sides

-3=k or k= -3

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Answer:

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Step-by-step explanation:

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In this case:

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We then try with (1,1):

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And with (2,2):

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Step-by-step explanation:

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2 years ago

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2 years ago

Suppose a research firm conducted a survey to determine the average amount of money steady smokers spend on cigarettes during a

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Step-by-step explanation:

Data provided in the question:

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Sample mean, μ = $20

Standard deviation, s = $5

Confidence interval = between $19 and $21

Now,

Confidence interval = μ ± $z\frac{s}{\sqrt n}$

thus,

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2 years ago