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mash [69]
3 years ago
7

To measure the speed of the jet stream, a weather plane left its base at noon and flew 800 km directly against the stream with a

n air speed of 750 km/h. It then returned directly to its base, arriving at 2:24 pm. What was the speed of the jet stream?
Mathematics
1 answer:
Mama L [17]3 years ago
3 0

Answer:

I’m not sure but I got this question asked before

Step-by-step explanation:

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Find The Area Of The Shape Shown Below
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Step-by-step explanation:

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Simplify completely the quantity 4 times x to the third power plus 5 times x to the 2nd power plus 3 times x all over x. (2 poin
julia-pushkina [17]

We start with

\dfrac{4x^3+5x^2+3x}{x}

We can factor x at the numerator:

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So, assuming x\neq 0 (otherwise the expression would make no sense) we can simplify it:

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To complete a task in 15 days, a company has 4 people each working 8 hours a day. The company
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Answer:

Let's suppose that each person works at an hourly rate R.

Then if 4 people working 8 hours per day, a total of 15 days to complete the task, we can write this as:

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Whit this we can find the value of R.

R = 1 task/(4*15*8 h) = (1/480) task/hour.

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5*( (1/480) task/hour)*(D*6 hours) = 1 task.

We only need to isolate D, that is the number of days that will take the 5 workers to complete the task:

D = (1 task)/(5*6h*1/480 task/hour) = (1 task)/(30/480 taks) = 480/30 = 16

D = 16

Then the 5 workers working 6 hours per day, need 16 days to complete the job.

b) The assumption is that all workers work at the same rate R. If this was not the case (and each one worked at a different rate) we couldn't find the rate at which each worker completes the task (because we had not enough information), and then we would be incapable of completing the question.

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