HELP Find the number of non-degenerate triangles whose vertices are three of the points on this six-point star.
1 answer:
Answer:
20
Step-by-step explanation:
The number of combinations of 6 points taken 3 at a time is ...
6!/(3!·(6-3)!) = 6·5·4/(3·2·1) = 5·4 = 20
___
If you number the points 1–6, the points of the 20 triangles will be ...
123 124 125 126 134
135 136 145 146 156
234 235 236 245 246
256 345 346 356 456
You might be interested in
x - 27 = 62 → ( add 27 to both sides )
x - 27 + 27 = 62 + 27
x = 89
drag first box then box with x = 89
Answer:
4/9
Step-by-step explanation:
There are 9 letters in the word zookeeper. 4 of those letters are either a k or an e. So the probability is 4/9.
and 9 are the squares of, respectively, 
and 3.
So, using
we have
Answer:
x is 5
Step-by-step explanation:
The line and parabola intersect at about x=-2 and x=1.5 so the solution is A. x = -2
