The correct answer I would think would be C but I would try A because B does no have a proportion of 3/4.
Answer:

Step-by-step explanation:

1. let x be the sold tickets for adults
3x be the sold tickets for students
x + 3x = 348
4x = 348
x= 87 tickets for adults
2. let x be the no. of books produced
41664 + 8.5x = 19x
41664 = 19x - 8.5x
41664 = 10.5x
x = 3968 books
Answer:3040
Step-by-step explanation:16000/100=160x19=3040
Answer:
245.84
Step-by-step explanation:
i hope this helps