A rectangular auditorium seats 1160 people. The number of seats in each row exceeds the number of rows by 11. Find the number of seats in each row.

Question

Need help! thx

Answer 1

r*(r+11) = 1160

 

r^2 + 11r - 1160 = 0

 

( r   +    40   )( r   -    29   ) = 0

 

r+40=0 results in negative measures

 

r-29=0 -- >   r=29

 

29 rows x 40 seats per row = 1160 seats