Question

a karate studio charges $35 for the first course and $22.50 for each course after that, even if the student leaves the course early. cena paid $170 for her son to take courses. how many courses did he take?
○ 6 courses
○ 7 courses
○ 8 courses
○ 10 courses

Explanation:

Step1: Subtract first course fee

Subtract the cost of the first course from total: \(170 - 35 = 135\)

Step2: Find number of additional courses

Divide remaining amount by cost per additional course: \(\frac{135}{22.50} = 6\)

Step3: Add first course

Total courses = additional courses + 1: \(6 + 1 = 7\)

Answer:

7 courses