The food truck is selling sandwiches. it costs $7 each week to advertise the sandwiches. each sandwich costs $4.25 to make and each sells for $6.50. write an equation to model the amount of profit, p, the food truck will make from selling x sandwiches in one week. a. p = 4.25x − 7 b. p = 2.25x − 7 c. p = 6.50x − 4.25 d. p = 7x + 2.25