Find the area of an equilateral triangle that has a perimeter of 24 units. All answers should involve only integers or radicals. How to type your if your answer is 2√ 5 type 2rad5

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.