doublejojo214
21.12.2019 •
Mathematics
Which of the following gives an example of a set that is closed under addition?
the sum of an odd number and an odd number
the sum of a multiple of 3 and a multiple of 3
the sum of a prime number and a prime number
none of these are an example of the closure property.
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Ответ:
7+7=14
a prime plus a prime can yield a composite
5+7=12
a multiple of 3 and a multiple of 3 will always yield a multiple of 3
3(n) + 3(m) =3(n+m)
Ответ:
x = 3
Step-by-step explanation:
Given
5(2x + 1) = 35 ( divide both sides by 5 )
2x + 1 = 7 ( subtract 1 from both sides )
2x = 6 ( divide both sides by 2 )
x = 3