Answer: 680
Step-by-step explanation:
When order doesn't matter,then the number of combinations of choosing r things out of n = 
Given: Total participants = 17
From these, a group of 3 participants is to be tested under a special condition.
Number of groups of 3 participants chosen = 

Hence, there are 680 groups of 3 participants can be chosen,.
2x+2x+3x+3+3x+3=146
10x+6=146
10x=140
x=14
45 units is the longest side
Hope this helped!!!!!
Answer:
331..?
Step-by-step explanation:
262 = 2a-400
662 = 2a
331
Answer:
The top one, as they are not parallen so they will eventually meet
Step-by-step explanation: