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padilas [110]
3 years ago
13

How to determine whether a number is prime or composite number without using calculator fast?

Mathematics
1 answer:
Assoli18 [71]3 years ago
3 0

Answer:

To prove whether a number is a prime number, first try dividing it by 2, and see if you get a whole number. If you do, it can't be a prime number. If you don't get a whole number, next try dividing it by prime numbers: 3, 5, 7, 11 (9 is divisible by 3) and so on, always dividing by a prime number

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√2 x √800 ( this makes it 20 characters)
marysya [2.9K]

Answer:

The correct answer would be 40

Step-by-step explanation:

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7 0
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Solve the system by the linear combination method show all work carefully
suter [353]
<span>A-2b=2
A-b=6

</span>
<span>A-2b=2
-2(A-b=6)
-2A+2b= -12

A-2b=2
-2A+2b = -12
-------------------
-A = -10
-A/-1 = -10/-1

A = 10

a-b=6
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10-10-b = 6 -10
-b = -4
-b/-1 = 14/-1
b= 4

Check
a - 2b =2
10 - 2(4) =2
10 - 8 = 2
2=2


</span>
7 0
3 years ago
Cups
shepuryov [24]

Answer:

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Romashka-Z-Leto [24]
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