8n + 22 = 70
-22 -22
8n = 48
n = 48/8
n = 6
n*3 = 3n = 6*3 = 18
3n = 18
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.
O.533333333,basically 8 divide by 15
For the answer to the question above, <span>what is the combined length of
the original line segment and its dilated image?
</span>RS = 10
image R'S' = 20
---> 10+20=30
I hope my answer helped you. Feel free to ask more questions. have a nice day!
Answer:
all of them except for compass
Step-by-step explanation:
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