Arestaurant customer left $1.65 as a tip. the tax was 7% and the tip was 15% of the after tax cost. which information is not needed to compute the bill after tax and tip? what was the total bill?

The cost varies directly with the number of tickets purchased. it costs $145 for 10 people to attend a concert. a. what is the constant of proportionality (k)? b. write the direct variation equation. c. home much does it cost for 8 people? d. graph this situation. be sure to label each axis and give the graph a title.