Eighty students are going on a field trip to a history museum. the total cost includes 2 bus rentals and $10 per student for lunch. the daily bus rental is $960 per bus. what is the total cost per student?

Here is the solution of the given problem above:
80 is the total number of students
Total cost: $10/student x 80 = $800
                 $960 x 2 = $1,920
In order to get the total cost per student, we need to get the sum of the cost of the food and bus rental. So 800 + 1,920 would be $2,720.
Now, divide the sum by 80 (number of students) and the result is 34. So the total cost per student is $34. 

No a triangle cannot be formed because when you add the two smallest number together (which would be 11) the have to be bigger than the number it is "against" ( which would be 12)