The cooper family, consisting of 6 children and 2 adults, goes to the movies and pays a total of $86. the griffen birthday party, consisting of 10 children and 3 adults, pays a total of $139 for tickets. let x = the cost of a child ticket and y = the cost of an adult ticket. how much does a child's ticket cost and how much does an adult ticket cost?

The cost of child's ticket = $10

The cost of adult ticket = $ 13

Step-by-step explanation:

Let x be the cost of a child ticket and y be the cost of an adult ticket.

Then According to the question, we have

Multiply equation (1) by 3 and equation (2) by 2, then we have

Subtract equation (1) from equation (2), we have

Substitute the value of x in equation (1), we get

Hence, the cost of child's ticket = $10

The cost of adult ticket = $ 13

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm