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MaRussiya [10]
2 years ago
9

F(x)=ex;g(x)=-7/8ex+3+3

Mathematics
1 answer:
Goshia [24]2 years ago
5 0

Answer:

dftybuyj

Step-by-step explanation:

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A student answers a multiple-choice examination question that offers four possible answers. Suppose the probability that the stu
Nitella [24]

Answer: 0.9730

Step-by-step explanation:

Let A be the event of the answer being correct and B be the event of the knew the answer.

Given: P(A)=0.9

P(A^c)=0.1

P(B|A^{C})=0.25

If it is given that the answer is correct , then the probability that he guess the answer P(B|A)= 1

By Bayes theorem , we have

P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(C|A^c)P(A^c)}

=\dfrac{(1)(0.9)}{(1))(0.9)+(0.25)(0.1)}\\\\=0.972972972973\approx0.9730

Hence, the student correctly answers a question, the probability that the student really knew the correct answer is 0.9730.

7 0
3 years ago
Alysha’s average speed when walking home from the market was 5 mph, and it takes her 21 minutes longer than when she drives to t
Delicious77 [7]

9514 1404 393

Answer:

  3 minutes

Step-by-step explanation:

Let x represent Alysha's time to drive home from the market.

Speed and time are inversely proportional to each other (for the same distance), so we have ...

  (walking speed)(walking time) = (driving speed)(driving time)

  5(x +21) = (8·5)(x)

  x +21 = 8x . . . . . . . . . divide by 5

  21 = 7x . . . . . . . . subtract x

  3 = x . . . . . . .divide by 7

It takes Alysha 3 minutes to drive home from the market.

3 0
3 years ago
If you place a 17 foot ladder against the top of a 8 foot building how many feet will the bottom of the ladder be from the botto
KatRina [158]
9 because if you subtract 17 from 8 you will get 9 I hope this works :)
7 0
3 years ago
Read 2 more answers
ANYONE PLZZ THIS DUE IN AN HOUR!!!! Will mark the brainliest
Semenov [28]

Answer:

Option C is correct.

Step-by-step explanation:

The area of 1 side of the divider is approximately 8 x 3 = 24 < 25  

Hope this helps!

:)

4 0
3 years ago
is it possible for this app to answer word problems under the subject of algebra 1 math because i really need help
son4ous [18]
Yes it is if the word problem applies to or is about math
7 0
3 years ago
Read 2 more answers
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