A customer ordered 3 Americanos and 4 lattes for a total of $18.00. At the same coffee shop a second
customer spends $2 less than the first customer for 5
Americanos and 2 lattes.
How much does each latte cost?

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.