a theater can seat 391 people .the number of rows is 6 less than the number of seats in each row.how many rows of seats are there.

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06-05-2017
Mathematics

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a theater can seat 391 people .the number of rows is 6 less than the number of seats in each row.how many rows of seats are there.

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Аноним Аноним · Answer 1 · 2017-05-06T15:23:49+02:00

Аноним Аноним

06-05-2017

x(x-6) = 391
x2-6x-391 =0(x-23)(x+17)=0

since the number of seats should be positive,

x = 23

The number of rows is 23 - 6 = 17

( To check our work )

391 / 17 = 23

So, there are 17 rows of seats.

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