Respuesta :

Answer:

8 lessons

Step-by-step explanation:

x45 + 100 ≤ 500

x45 ≤ 500 - 100

x45 ≤ 400

x ≤ 8

8 * 45 + 100 ≤ 500

360 + 100 ≤ 500

460 ≤ 500