Answer:
![\$10.50](https://img.qammunity.org/2020/formulas/mathematics/high-school/sywcxxlt2o28jwzx1s7rrscfufxx4fq7ws.png)
Explanation:
Let be "b" the cost in dollars of each bag.
According to the information provided in the exercise, yo know that the total cost of 5 bus tickets that the Hipster Dance company purchases is:
![(\$150)(5)=\$750](https://img.qammunity.org/2020/formulas/mathematics/high-school/5u692ke3d86zndlvkhq0xif1gokv2sq0lb.png)
And they have 7 bags that cost "b" dollars each. So, the total cost of 7 bags can be represented with this expression:
![7b](https://img.qammunity.org/2020/formulas/mathematics/high-school/3vj75wsthrc3048yfw0cz4z49ge8i7j5qi.png)
Since the total bill is $823.50, you can write the following equation to represent this situation:
![750+7b=823.50](https://img.qammunity.org/2020/formulas/mathematics/high-school/mvuh6aei3y3nguj4tvs50jj2hupmxq1t5w.png)
Solving for "b", you get:
![b=823.50-750\\\\b=(73.50)/(7)\\\\b=10.50](https://img.qammunity.org/2020/formulas/mathematics/high-school/2yjnb8pgc1d2scd3zf36c4yk13axykbey0.png)