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KonstantinChe [14]
3 years ago
7

5/2b+(-25/2)=-10 what is the value of b?

Mathematics
1 answer:
gulaghasi [49]3 years ago
8 0
The value of b in the equation 5/2b+(-25/2) is 1. 

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in a class of 40 students, 24 are over the age of 21 and 16 are 21 or younger. Biff is over the age of 21. A student is selected
LenKa [72]

Answer:

3. 60% probability the student is over the age of 21.4

4. 4.17% probability Biff was selected if you know the student selected was over the age of 21.

5. 0% probability Biff was selected if you know the student selected was 21 or younger

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcoes.

In this question:

40 students

24 over the age of 21.

16 are 21 or younger.

3. Find the probability the student is over the age of 21.

24 of the 40 students are over the age of 21.

24/40 = 0.6

60% probability the student is over the age of 21.4

4. Find the probability Biff was selected if you know the student selected was over the age of 21.

24 students over the age of 21, one of which is Biff.

1/24 = 0.0417

4.17% probability Biff was selected if you know the student selected was over the age of 21.

5. Find the probability Biff was selected if you know the student selected was 21 or younger

Biff is not 21 or younger, he is over 21, so there are no desired outcomes.

So, 0% probability Biff was selected if you know the student selected was 21 or younger

8 0
3 years ago
Mrs. Barnes washed 2 7 of her laundry. Her son washed 1 4 of it. Who washed most of the laundry? How much of the laundry still n
wlad13 [49]

Answer:

Mrs. Barnes washed more.

Step-by-step explanation:

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3 years ago
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ValentinkaMS [17]
Last option is your answer ( 0.00000991)
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2 years ago
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bixtya [17]

Answer:

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Step-by-step explanation:

x-3x+3<6

Combine like terms

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-2x +3-3<6-3

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Divide each side by -2,remembering to flip the inequality

-2x/-2 > 3/-2

x > -3/2

5 0
2 years ago
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