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vlabodo [156]
3 years ago
10

robert is trying to collect all the cards of a special collectors edition set of hockey cards. He has 18 cards, which is 40% of

the set. How many cards are in the selection? How many more cards does he need?
Mathematics
1 answer:
Digiron [165]3 years ago
6 0

Answer:

27

18 is 40% have 18 is 9 9 is 20% 18 + 9 equals 27 and you already have 40 18 + 18 is 80% all you need is 20 more percent which is 9

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Answer:

n = 20.

Step-by-step explanation:

The external angles of a polygon add up to 360 degrees. So:

30 + 42 + 16(n - 2)   = 360   where n is the number of sides of the polygon.

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16n = 320

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Step-by-step explanation:

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Step-by-step explanation:

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(a) see attachment

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2 years ago
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