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astraxan [27]
4 years ago
11

A bag contains 3 red marbles, 5 green marbles and 7 blue marbles. If Janelle picks one marble out of the bag, what is the probab

ility that the marble is red?
Mathematics
1 answer:
lisabon 2012 [21]4 years ago
8 0

3+5+7 = 15 total marbles

3 are red

 so she has a 3/15 reduces to 1/5 probability of picking a red one

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Peter has 30 pens and Tony has 14 pens .How many pens must Tony give Peter so that Peter shall have 3 times as many as Tony?​
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2 years ago
How do I solve for the missing lengths?
Advocard [28]

Answer:

Part 4) ER=3\ units

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we know that

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EF^2=ER^2+RF^2

substitute the given values

(3\sqrt{10})^2=ER^2+9^2

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ER^2=(3\sqrt{10})^2-9^2

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Part 5) Find DF

we know that

In the right triangle DRF

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DF^2=DR^2+RF^2

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DF^2=27^2+9^2

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DF=9\sqrt{10}\ units

Part 6) Find DE

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3 years ago
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