500
Mallory and some of her friends went to the movies last Saturday night. They each spent $9.50 on a movie ticket and all together, $25.50 was spent on candy. $82.50 was the total for all the girls' tickets and candy. Write and solve an equation to figure out how many friends went to the movies with Mallory.
What is 9.50f+25.50=82.50, f=6