Question

A box lunch costs b. A bag of chips is $2 extra. Write an expression to show the 10 lunches with chips and 15 lunches without. Simplify the expression

Answer 1

ten lunches with chips would be 10(b+2)

15 lunches without chips is 15b

if you need the total for all lunches it would be the sum of the two answers, or
10b+20+15b = 25b+20