Question 1:
Choir A - 129.5 = 130
Choir B - 130.1 = 130
Choir C - 130.8 = 131
Choir D - 129.8 = 130
Answer - Choir C
Question 2:
132 = 1/2x + 2(x - 9)
= 1/2(60) + 2(60 - 9)
= 30 + 102
= 132
60 - 9 = 51
Answer - The cost of a children's ticket is $51
