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1 vote
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

User Pumpkinpro
by
7.9k points

2 Answers

5 votes
7 course
Because if 35 is the initial payment you would subtract that from 170. Then get 135 which you would divide by 22.5 and get 6 then you add the first one which makes 7
22.5x+35=170
User Adam Liter
by
8.7k points
3 votes

Answer: The correct option is (B) 7.

Step-by-step explanation: Given that 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.

We are to find the number of courses that he took.

Let x represents the number of courses that Cena took.

Then, according to the given information, we have


35+22.50* (x-1)=170\\\\ \Rightarrow 22.50(x-1)=170-35\\\\ \Rightarrow 22.50(x-1)=135\\\\ \Rightarrow x-1=(135)/(22.50)\\\\\Rightarrow x-1=6\\\\ \Rightarrow x=7

Thus, the required number of courses that Cena took is 7.

Option (B) is CORRECT.

User Sanket Kachhela
by
8.6k points
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