Chapter 1.8, Problem 35E

To determine

To find : Let $c$ represents the cost in dollars of a ticket at the local movie theatre. You use a $20 bill to pay for the two tickets. Write the variable expression for the amount of change you receive.

Answer to Problem 35E

The variable expression for the amount of change received is $\text{20}-2c$ .

Explanation of Solution

Given information :

Consider, the statement provided in the question,

  $c$ is the cost in dollars of a ticket at the local movie theatre and $20 bill is used to pay for the ticket.

Solution :

Since, $c$ is the cost of a ticket then cost of two ticket is $2c$ .

Total amount paid is $20. Therefore, the expression for the change received will be

  $\begin{array}{l}\text{Amout of bill paid}-\text{Cost of two ticket}\\ \text{20}-2c\end{array}$

Hence,

The variable expression for the amount of change received is $\text{20}-2c$ .