1)an exam worth 172 points contains 30 questions. some questions are worth 2 points, and the others are worth 9 points. how many 2 point and 9 point questions are on the test?

2) tickets to the fair cost $6 for children and $13 for adults. on saturday 163 people
enter the fair and they collected $1566. what number of children and what number
of adults attended?

3) tickets at a particular movie theater have different rates for adults and children.
on saturday the theater sold 8 adult tickets and 7 child tickets for $132. the next
day, the theater sold 4 adult tickets and 5 children tickets for $72. what is the price
for the adult ticket and the price for the child ticket?