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cestrela7 [59]
4 years ago
9

Determine whether the following relation represents a function. If it is a function, state the do

Mathematics
1 answer:
7nadin3 [17]4 years ago
6 0

Answer:

Yes, I cannot tell what it wants you to state if it is though.

Step-by-step explanation:

I am assuming you are familiar with coordinates representing x and y coordinates so (x,y).  If this is unfamiliar let me know.

For a function, there cannot be a repeat of xs unless every one goes to the same y.  So for instance if (3,4)(3,5) were in the list this would not be a function because 3 is used twice but goes to a different number each time.

If the list had (3,4) twice so (3,4)(3,4), that could still be a function.

In your list There are no repeating xs, so you don't even need to check.  It is a function.

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Answer:

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Step-by-step explanation:

X=5 and Y=1

Direct variation can be represented by the equation y=kx.

Therefore,

1 = k(5)

5 = k

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An airplane travels 5040 kilometers against the wind in 9 hours and 6660 kilometers with the wind in the same amount of time. Wh
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Flying against the wind, an airplane travels 4200 km in 7 hours. Flying with the wind, the same plane travels 4000 km in 4 hours. What is the rate of the plane in still air and what is the rate of the wind?

Answer · 1 vote

Let Va = the velocity of the airplane Let Vw = the velocity of the wind When flying with the wind: (Va+Vw)*(4 hours) = 4000 4Va + 4Vw = 4000 4Vw = 4000 - 4Va Vw = 1000 - Va When flying against the wind: (Va-Vw)*(7 hours) = 4200 km7Va - 7Vw = 4200 Substitute 1000-Va for Vw and solve for Va: 7Va - 7(1000-Va) = 4200 7Va -7000 + 7Va = 4200 14Va = 11200 Va = 800 km/hr Rate of wind: Vw = 1000 - Va = 1000 - 800 = 200 km/hour

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Flying against the wind, an airplane travels 4500 in 5 hours. Flying with the wind, the same plane travels 4640 in 4 hours. What is the rate of the plane in still air and what is the rate of the wind?

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The speed of plane in still air is 1030 km/hr and wind

Step-by-step explanation:

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3 years ago
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