Nope.
They don't meet the requirements of the triangle inequality.
2.1 + 4 = 6.1 < 7.9
The triangle inequality requires the sum of any two sides be greater than the third side.
Answer:
1. 30/14
2. -26.775
3. 0.1668
4. -44/7 which can be simplified into -6 and -2/7
5. $10.96
A, because: 20x10 1/2=210
And 20x11 1/4=225
And 225-210=15
So thats the answer.
They have to pay the 30$ fee first then it depends on how many people are coming with you
2(x+2) = 60
x+2 = 30
x = 28
The correct answer is C