Giselle bought a dress for $35 and 3 t-shirts. she used a coupon for $2.50 off each t-shirt. the total cost can be modeled by the expression 35+3(n-2.5).what does n-2.5 represent

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.