Akarate 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

Answer-

He took 7 courses.

Solution-

A karate studio charges $35 for the first course and $22.50 for each course after that.

Cena paid $170 for her son to take courses.

Let us assume that he took x number of courses.

So, for the first class he will pay $35, then for the remaining (x-1) days he will pay $22.50 per day.

So the total amount paid by him is,

But it is given that he totally paid $170, so

Therefore, he took 7 courses.

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i did it myself and i got 4.2 (b) hope its right

step-by-step explanation: