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OverLord2011 [107]
3 years ago
8

A bag contains 9 marbles: 2 are green, 5 are red, and 2 are blue. Lucy chooses a marble at random, and without putting it back,

chooses another one at random. What is the probability that both marbles she chooses are green? Write your answer as a fraction in simplest form.
Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
5 0
1/9 I think. because the first answer I get is 2/18 which then made I smaller to 1/9 and that was the simplest from I got.
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Please help and show steps so i could figure out how to do it , will give branliest!
erastova [34]

Answer:

8

Step-by-step explanation:

1. 3b - 2 (1 - b) / a - 2

2. 3(2) - 2 (1 - 2) / 3 - 2

3. 6 - 2 (-1) / 1

4. 6 + 2 / 1

5. 8 / 1

6. 8

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For 20 points and brainliest ​
Nata [24]

Answer:

(-3)^10

Step-by-step explanation:

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Step-by-step explanation:

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How much is 2.1x 82
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2.1 x 82 =

172.2

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You buy 3 shirts and 1 pair of pants for $32. Your friend buys 2 shirts and 3 pairs of pants for $40.
koban [17]

You buy 3 shirts and 1 pair of pants for $32. Your friend buys 2 shirts and 3 pairs of pants for $40. How much did each item cost?

 

First let’s define a shirt as X and pants as Y!

 

In the first scenario, the equation will be 3X + Y =$32

In the second scenario, the equation will be 2X + 3Y = $40  

 

Now because we have two different variables (X & Y) let’s solve for one of them (Ex: Y) to simplify the equations!

 

3X + Y= $32—> subtract 3X on both sides of the equation  

-3X.        - 3X

 

Net result: Y= 32- 3X

 

Now we can insert this into the second equation 2X + 3Y = $40 in order to solve for X variable  

 

2X + 3(32-3X) = $40

2X + 96 - 9X = $40 —> simplify the equation  

-7X + 96 = $40 —> substrate 96 from both sides  

-7X = -56 —> divide both sides by -7  

X= 8  

 

Now reinsert 8= X into 3X + Y = $32

3(8) + Y = $32

24+ Y = $32 —> substract 24 from both sides

y = 8

   

ANSWER: X= 8, Y= 8

If I am wrong I am sorry >_<

5 0
3 years ago
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