<span>38 < 4x + 3 + 7 – 3x
38 < x + 10
38 - 10 < x
28 < x or x > 28
answer
x>28</span>
3/6 or 1/2 because 3 of 6 numbers are able to be divided by 2
Answer:
1330 rounds of meetings
Step-by-step explanation:
You have a total of 21 people, and they all want to meet with each other in groups of 3. This means we are dealing with a combination problem, where combination is the selection of items in which order does <em>not</em> matter.
Formula for combination:
ₙCᵣ = ![\frac{n!}{r!(n-r)!}](https://tex.z-dn.net/?f=%5Cfrac%7Bn%21%7D%7Br%21%28n-r%29%21%7D)
where <em>n</em> is the total number of objects (in this case, total number of people: 21), and r is the sample set (in this case, groups: 3).
We plug in and get:
-> ![\frac{21!}{3!(21-3)!}](https://tex.z-dn.net/?f=%5Cfrac%7B21%21%7D%7B3%21%2821-3%29%21%7D)
-> 1330 different meetings for everyone to meet with each other in groups of 3.
The vertex is (-3,3),so a =-3, b=3. a+b=0