3 years ago

What of these numbers is a prime number 1,11,21,51

Mathematics

1 answer:

Zepler [3.9K]3 years ago

7 0

11. It is not the multiple of any numbers smaller than it

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2 years ago

Which ordered pairs are in the solution set of the system of linear inequalities? y > -1/2x y <1/2 x + 1

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Look at the picture.

$y=-\dfrac{1}{2}x\\\\for\ x=0\to y=-\dfrac{1}{2}\cdot0=0\to(0;\ 0)\\\\for\ x=2\to y=-\dfrac{1}{2}\cdot2=-1\to(2;\ -1)\\\\\\y=\dfrac{1}{2}x+1\\\\for\ x=-2\to y=\dfrac{1}{2}\cdot(-2)+1=-1+1=0\to(-2;\ 0)\\\\for\ x=0\to y=\dfrac{1}{2}\cdot0+1=1\to(0;\ 1)$