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Bezzdna [24]
3 years ago
13

Dan bought five new baseball trading cards to add to his collection .The next day his dog ate half of his collection .There are

now only twenty nine cards left .How many cards did Dan start with?with equation and result
Mathematics
2 answers:
AleksandrR [38]3 years ago
8 0

-- After dog ate 1/2 of the collection, there were 29 remaining.

-- Just before dog came along, there were (2 x 29) = 58 cards.

-- That was after Dan added 5 new ones.

-- Before he added the 5 new ones, there were (58 - 5) = 53 cards.

-- When this story began, Dan had <em>53 cards</em>.


KonstantinChe [14]3 years ago
6 0


first you double 29

than subtract the 5 new cards

29  x 2 - 5

   58-5

your answer is 53

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Step-by-step explanation:

to compare them, we should all bring to the same denominator.

the lcm (lowest common multiplier) is the that denominator.

let's use the approach of the prime factors :

3 : 3

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32 : 2×2×2×2×2

24 : 2×2×2×3

the lcm is the combination of the longest "streaks" of the prime factors.

so,

2×2×2×2×2 × 3 × 5 = 32×15 = 480

2/-3 = -2/3 = -320/480 (as 3×160 = 480)

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21/-32 = -21/32 = -315/480 (as 32×15 = 480)

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as

-384/480 < -320/480 < -315/480 < -300/480

we can say

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3 years ago
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alukav5142 [94]
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ivanzaharov [21]

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4 0
3 years ago
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