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3 years ago

How do you know if a problem is extraneous or not?

Mathematics

1 answer:

Maurinko [17]3 years ago

5 0

Answer:

Step-by-step explanation:

An extraneous solution is a solution that's not really a solution. In other words, you work out the problem and you obtain a solution. Then you test your solution by plugging in your solution to the formula given, if the result is false then it's considered an extraneous solution.

For example, if you're solving for time it took for a football to reach the ground after somebody threw it, you would obtain two answers for time. These time answers are negative time and positive time, well the negative time makes no sense since it's before you threw the ball so we would consider that negative solution to be extraneous.

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Which is a solution to the equation y=3x+1?

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Quite tricky but my answer would be D

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3 years ago

Suppose a test has six multiple-choice questions with four options and eight true/false questions. If a person responds to all q

vova2212 [387]

Answer:

1,360

Step-by-step explanation:

Ok, so for the first 6 questions, if each one can be answered 4 different times, that would mean that it would be 6 to the 4th power (or 6 x 6 x 6 x 6)

That would be 1296.

Then, we have the other 8 questions, that can be answered 2 different ways. That would be represented as 8 to the second power (or 8 x 8)

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That's how you get the answer! I hope this is correct!

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3 years ago

A plane flies 910 miles with the wind in the same time it can go 660 miles against the wind. The speed of the plane is still air

lorasvet [3.4K]

Answer:

The speed of the wind is 48.56

Step-by-step explanation:

We can use the following formula to calculate the distance:

distance = speed x time

Let w represent the speed of the wind.

If the plane flies with the wind, the speed will be the speed of the plane + the speed of wind. Since it can fly 910 miles, and the speed of the plane is 305

910 = (305 + w) x time (1)

If the plane flies against the wind, the speed will be the speed of the plane - the speed of wind. Since it can fly 660 miles, and the speed of the plane is 305

660 = (305 - w) x time (2)

Since the time is equal for both equation in 1 and 2:

$\frac{910}{305+w}$ = $\frac{660}{305-w}$

→ 910(305-w) = 660(305+w)

→ 277550 - 910 w = 201300 + 660w

→ 1570w = 76250

→ w = 48.56

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3 years ago

I GIVEEE BRAINLILST TTT

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Answer:nrtfggfnyhrthth vvsdgerghrf

Step-by-step explanation:

fghgf bncf njhgfnfnngfchfgngn fgnffbnfgggnfgn

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