The internal angles of a triangle always add up to 180 degrees.
2.a it should have 20 dollars in it
2.b it should take 5 days
i don't know the number 3
Check the graph and observe where x = 2.
And check where it cuts across the line of the graph.
If you trace the graph carefully, when x = 2, y = -2
So the value of the function is -2.
I hope this helps.