Answer:
170 tickets.
Step-by-step explanation:
Write formulas for the question.
![N_2+N_3=400](https://tex.z-dn.net/?f=N_2%2BN_3%3D400)
![2N_2+3N_3=1030](https://tex.z-dn.net/?f=2N_2%2B3N_3%3D1030)
Then use substitution.
![N_2=-N_3+400](https://tex.z-dn.net/?f=N_2%3D-N_3%2B400)
![2(-N_3+400)+3N_3=1030](https://tex.z-dn.net/?f=2%28-N_3%2B400%29%2B3N_3%3D1030)
![-2N_3+800+3N_3=1030](https://tex.z-dn.net/?f=-2N_3%2B800%2B3N_3%3D1030)
![N_3=230](https://tex.z-dn.net/?f=N_3%3D230)
So number of $3 tickets sold is 230. But they ask for the tickets bought in advance (i.e. the tickets sold for $2). Use substitution again.
![N_2+230=400\\N_2=400-230\\N_2=170](https://tex.z-dn.net/?f=N_2%2B230%3D400%5C%5CN_2%3D400-230%5C%5CN_2%3D170)
Answer:
T = -7 + 3t .
Step-by-step explanation:
T = -7 + 3t where T = the temperature and t = the times in hours.
I believe it would be d. equilateral. becuz a equilateral triangle is a triangle with 3 equal sides, and 3 equal angles.
D..............................