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pentagon [3]
3 years ago
9

What is the probability of getting either blue or green on a spinner that is 3/10 green and 1/5 blue

Mathematics
1 answer:
Luba_88 [7]3 years ago
5 0
Since it's either/or, we can simply add up 3/10 (0.3) and 1/5 (0.2) to get 0.5=1/2

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The answer is A 5+c
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2. Multiply. -(-c-5)
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Marysya12 [62]
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What is the greatest common factor of 90, 126, 180 and 990?
mylen [45]

9514 1404 393

Answer:

  18

Step-by-step explanation:

90 = 18·5

126 = 18·7

180 = 18·10

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The greatest common factor of these numbers is 18.

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<em>Comment on the GCF</em>

It can be useful to know Euclid's algorithm for finding the GCF:

  1. Determine the remainder from dividing the larger number by the smaller.
  2. If the remainder is zero, the smaller number is the GCF. If the remainder is non-zero, use it to replace the larger number and repeat from step 1.

For example, 126 mod 90 = 36; 90 mod 36 = 18; 36 mod 18 = 0, so 18 is the GCF of 126 and 90. (The modulo function 'mod' returns the remainder from division.)

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