Sabina had 40$. she paid d dollars for lunch and 0.5d dollars for a snack. which expression represents the amount of money sabina has left?

a. 40 + 1.5d
b. 40 x 1.5d
c. 40 - 1.5d
d. 40 / 1.5d

C. 40 - 1.5d is the correct expression which represents the amount of money Sabina has left.

$40 is what she started with, and she paid d (or, 1d) for lunch, and then 0.5d for a snack. 1d + 0.5d = 1.5d. That's how much she spent, so you take it away from 40, therefore C is the correct option.

C. is the correct answer because you can see the clue word "left". LEFT is a clue word that gives you a clue that you need to subtract. So subtraction would be the correct operation.