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2 years ago

What prime factor is common to 35, 84 and 21?

Mathematics

2 answers:

Vika [28.1K]2 years ago

4 0

Answer:

7 is the prime factor that is common to all three numbers.

7x5 = 35

7x12 = 84

7x3 = 21

Let me know if this helps!

inn [45]2 years ago

4 0

Answer: 7

35/7=5
84/7=12
21/7=3

5, 12, and 3 don’t have any common factors so 7 is the prime factor.

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3 years ago

Need help please and thanks

madreJ [45]

Answer:

2. n = 11

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Step-by-step explanation:

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First we will open the bracket by distributive property A( B +C) = AB + AC

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Using distributive property A( B +C) = AB + AC we get

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Using distributive property A( B +C) = AB + AC we get

$-8 - n = -3\times 2n - -3\times4\\-8-n=-6n+12\\\textrm{all the n terms to the left inside and the constant of the right-hand side}\\6n-n=8+12\\5n=20\\n=\frac{20}{5}\\ \therefore n= 4$

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Using distributive property A( B +C) = AB + AC we get

$-4\times 2 --4\times y + 3y = 3\times y -3\times 4\\-8+4y+3y =3y-12\\\textrm{all the y terms to the left side and the constant to the right side}\\4y+3y-3y=-12+8\\4y=-4\\y=\frac{-4}{4}\\ \therefore y=-1$

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3 years ago

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Answer:

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3 years ago

What prime factor is common to 35, 84 and 21?​

What prime factor is common to 35, 84 and 21?