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Schach [20]
2 years ago
14

Duolingo assigned you 20 assignments over the weekend. You completed 4/5 of the assignments. How many assignments did you comple

te?
Mathematics
1 answer:
ValentinkaMS [17]2 years ago
7 0

Answer:

19.2

Step-by-step explanation:

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Four brothers share 5 packs of stickers equally. In fraction, how much is each brother’s share?
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4/5

Step-by-step explanation: there are four brothers (numerator) and 5 packs of stickers(denominator)

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Need help asap I’m stuck
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the first one

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HELPPP Paul is making two ceramic plates in his pottery class. One plate has a 20-centimeter diameter and a 62.8-centimeter circ
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5 0
3 years ago
Prove that 25^11−5^19 is divisible by 31.
SCORPION-xisa [38]

Answer:

Divisible by 3 is the answer

Step-by-step explanation:

First get everything to have the same base of 5

25^11 - 5^19

(5^2)^11 - 5^19

5^(2*11) - 5^19

5^22 - 5^19

Now factor out the GCF 5^19 to get

5^22 - 5^19

5^(19+3) - 5^(19+0)

5^19*5^3 - 5^19*5^0

5^19(5^3 - 5^0)

5^19(125 - 1)

5^19*(124)

At this point, we factor the 124 into 31*4 to end up with this full factorization: 5^19*31*4

Therefore, 25^11 - 5^19 is equivalent to 5^19*31*4

Since 31 is a factor of the original expression, this means the original expression is divisible by 31.

4 0
3 years ago
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