Wendy's has a new burger deal. They will charge you $2.50 for a burger and $0.25 per topping. If you spent $4.00 on your burger, how many toppings did you order?

6 toppings

Step-by-step explanation:

If I spent $4, I need to subtract 2.50.

4-2.50=1.50

If each topping is $0.25, I need to divide.

1.50 ÷ 0.25 = 6

Anna's mistake is writing Keisha's guess into the equation. It says 250 less than 2 times the number of candy. Therefore, it should be 2x - 250 and the inequality should be 3x + 100 < 250 - 2x.

Can you find your teacher's mistake?

If you reduce the inequality you get:
x < -350

There is no such thing as negative candy so the question is written wrong.