I need help
on number 6.

Answer:
189
Explanation:
Child : Adult = 8 : 1
So, let the no of child tickets = 8x
No. of adult tickets = x
On Saturday,
8x - x = 147
7x = 147
x = 147/7
x = 21
No of child tickets = x + 147 = 21 + 147 = 168
Total no. of tickets sold on Saturday = 168 + 21 = 189