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2 years ago

Solve kx + 7 = 4 for x.

Mathematics

1 answer:

svlad2 [7]2 years ago

9 0

Answer: x=-3/k

Step-by-step explanation:

kx + 7 = 4

kx=4−7

kx=−3

x=-3/k

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Superbowl Weekend! :-)

- Cutiepatutie ☺❀❤

Guest

1 year ago

cutiepatutie?

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Step-by-step explanation:

Given sample size n = 64

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Explanation:-

Given mean of the Population μ = 400

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Given mean of the sample x⁻ = 350

Standard deviation of the Population σ = 100 hours

Null hypothesis : H₀:The manufacturer has right to take the average life of the light bulbs is 400 hours.

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Alternative Hypothesis: H₁: μ ≠400

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The tabulated value Z₀.₉₅ = 1.96

The calculated value Z = 4 > 1.96 at 0.05 level of significance

Null hypothesis is rejected.

Conclusion:-

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