Which of the following groups of numbers are all prime numbers? A. 3, 11, 23, 31 B. 2, 3, 5, 9 C. 2, 5, 15, 19 D. 7, 17, 29, 49
Mekhanik [1.2K]
A because 9 is not prime in answer B, 15 is not prime in answer C, and 49 is not prime in answer D. So the correct answer is A.
You want to do to one side the same thing you do to the other side.
In order to get the n by itself you divide the 25n by 25. But in order to not change the answer you need to do the same to the 70.
![\frac{25n}{25} = \frac{70}{25}](https://tex.z-dn.net/?f=%20%5Cfrac%7B25n%7D%7B25%7D%20%3D%20%20%5Cfrac%7B70%7D%7B25%7D%20)
so n=
![\frac{70}{25}](https://tex.z-dn.net/?f=%20%5Cfrac%7B70%7D%7B25%7D%20)
which can be reduced to
![\frac{14}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B14%7D%7B5%7D%20)
so n=
Answer:
$258 <u><em>I think</em></u>
Step-by-step Explanation:
Answer:
5
Step-by-step explanation:
44 - 29 = 15
15 \ 3 = 5