3 years ago

In a theater there are 15 chairs in the first row, each row has 3 more chairs than the previous

Mathematics

1 answer:

andrew11 [14]3 years ago

5 0

Answer:663

Step-by-step explanation:

The first row is 15,so you have to add three from the first row you and you get 18 and then you keep going and going till you get to the 17th row then you add the numbers together.

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