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Ludmilka [50]
2 years ago
15

A technician charges P 400 per hour and spends P 500 a day on gasoline. Write an alcat expression to represent his earnings for

one day.
Mathematics
1 answer:
Basile [38]2 years ago
4 0

Answer:

y=400*x-500

Step-by-step explanation:

The expression that represents the problem is:

y=400*x-500

Function y represents earnings for one day.

400 is the fixed number that is charge for one hour work

x represents the number of hours that the technician has worked for one day

To find the total earnings you should multiply the fixed charge for one hour work (400) by the number of hours worked in a day.

Then you need to substract the cost of gasoline in a day, it is 500 and it is a constant in the equation since it doesn't depend on the number of hours worked.

So, the function is:

y=400*x-500

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What is the intersection of the following sets? G = {3, 7, 8, 9} H = {2, 5, 7, 8}
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"The intersection (∩) of a pair of sets (G and H) is a third set (I) composed by the elements that belong, at the same time, to both given sets."

According to this definition:

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Answer:

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And then the confidence level would be given by 99%

Step-by-step explanation:

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Assuming the X follows a normal distribution

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The distribution for the sample mean is given by:

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The confidence interval is given by this formula:

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The marginof error for this case is given by Me=25.76. And we know that the formula for the margin of error is given by:

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Confidence =1-\alpha=1-0.01=0.99

And then the confidence level would be given by 99%

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