Answer:
66
Step-by-step explanation:
If there are <em>n</em> students, then the number of pairs is 
.
With 12 students, 
pairs can be formed.
The reason the formula works is this: Each of the 12 students can be paired with 11 other students (no student is paired with him/her self). But counting 12 x 11 = 132 counts each pair <u>twice</u>. Example: student A can be paired with student B,..., student B can be paired with student A. The pair was counted two times.
See the attached image that shows pairings of 5 students. There are
5(5 - 1)/2 = 5(4)/2 = 10 pairs.
Answer:
6
Step-by-step explanation:
on top,bottom and four on every sides.
Answer:
1) Amy can invite 17 people.
2) x > 76
3) 40 - 6 is greater than or equal to 3x
4) x is greater than or equal to 98
Step-by-step explanation:
1) 50 + 8x = 200
2) 200 < 3x - 28
3) 40 = 6 +3x
4) (95 + 78 + 89 + x)/4 is greater than or equal to 90
The statement that best describes Georgia’s Barrier Islands is; A: They protect the coastline during storms.
<h3>What is the correct statement about the place?</h3>
Barrier islands are called “barrier islands” due to the fact that they are good means of creating barrier between the mainland and the ocean.
Now, these barrier islands tend to shelter and protect the mainland from the powerful forces of wind, waves, and other natural disasters. This they do by;
- Sheltering the estuaries that form behind the barriers.
- Allowing marshes to build up in the quiet waters of the sound.
- Filtering of the pollutants that come in from mainland rivers by the marshes.
- Providing valuable habitats for water animals and others in that ecosystem.
- Serve aesthetic purposes
Barrier islands are a very much valuable resource. Despite the fact that they constantly change and may become badly eroded, they can still rebuild if left alone.
Thus, we can conclude that statement best describes Georgia’s Barrier Islands is that they protect the coastline during storms.
Read more about Correct statement at; brainly.com/question/25800832
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