Answer:
4
Step-by-step explanation:
There are 4 ways to ignore one of the points. The other 3 can be connected to form a triangle.
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More formally, the number of ways that 4 items can be chosen 3 at a time is given by ...
... C(4, 3) = 4!/(3!(4-3)!) = 4/1 = 4
The answer is <span>
B: x+y=700
2x+4.5y=1200
</span>
<span>x - the number of student tickets sold,
y - the number of adult tickets sold
The total number of sold tickets is 700:
x + y = 700
</span><span>Adult tickets sold for $4.50 each and student tickets cost $2.oo each. If they took in a total of $1,200:
2x + 4.50y = 1200
The system of equations is:
</span>x + y = 700
2x + 4.50y = 1200
The answer to the question is in the picture.
X + (2x-1) = 41
3x - 1= 41
3x = 42
x = 14
14 and 27
