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3 years ago

7

There are three boxes and 12 balls. Exactly 3 of the balls are red. The first box fits three balls,the second four and the third

five. If we randomly put the balls into boxes, what is the probabilitythat all three red balls are put in the same box

1 answer:

exis [7]3 years ago

5 0

Answer:

1/36. 1/12 times 1/3 equals 1/36

Step-by-step explanation:

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Please help me need to revise for a testtt!!!!

LUCKY_DIMON [66]

Remember you can add like terms exg, 3y+4y=7y 3y^2+4y^2=7y^2, but cannot add 3y^2 and 4y, or 3 and 4y so

3a+2w-5a-9w
group like trems
3a-5a+2w-9w
subtract
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3y^2+2w^2-y^2-w^2
group like terms (think of w^2 and y^2 as 1w^2 and 1y^2)
3y^2-y^2+2w^2-w^2
subtract
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2x+2x=4x

3 0

2 years ago

Read 2 more answers

Anybody know the answer I need help. Please

Evgen [1.6K]

Answer:

$\dfrac{p^2+9p+2}{p^2-49}$

Step-by-step explanation:

Problems like this require that you recognize that the denominator of the right term is a factor of the denominator of the left term. That is, you're supposed to know how to recognize and factor the difference of two squares.

$\dfrac{5-p}{49-p^2}+\dfrac{p+1}{p-7}=\dfrac{p-5}{p^2-49}+\dfrac{p+1}{p-7}\\\\=\dfrac{p-5}{(p-7)(p+7)}+\dfrac{p+1}{p-7}\cdot\dfrac{p+7}{p+7}\\\\=\dfrac{(p-5)+(p+1)(p+7)}{(p-7)(p+7)}=\dfrac{p-5+p^2+8p+7}{p^2-49}=\dfrac{p^2+9p+2}{p^2-49}$

8 0

3 years ago

Plz tell the answers in the correct order

Nimfa-mama [501]

Answer:

a) 120°

Step-by-step explanation:

i think this is the right answer

7 0

3 years ago

It takes 15 hours for 4 men to paint a room.

kolezko [41]

Answer:

6

Step-by-step explanation:

If there was one man, he would have taken 15×4= 60 hours

To complete the job in 10 hours, 60÷10 = 6 men will be needed

6 0

3 years ago

Find the interquartile range using the following data 4 ,4 , 4 ,4 ,5, 6 ,7 , 7 ,7

katen-ka-za [31]

Answer:

3

Step-by-step explanation:

Ascending order:

4 ,4 , 4 ,4 ,5, 6 ,7 , 7 ,7

9 data: split in

4 ,4 , 4 ,4 | 5 | 6 ,7 , 7 ,7

4 ,4 | 4 ,4 | 5 | 6 ,7 | 7 ,7

(7+7)/2-(4+4)/2

=7-4

=3

7 0

3 years ago