Answered

A section of a football stadium has rows of
seats. The row closest to the pitch has 22 seats.
Each subsequent row has two more seats than the
previous row.
The section has 270 seats in total. Find the value
of x


FYI this is arthematic sequence question



Answer :

Answer:

125

Step-by-step explanation:

arithmetic sequence : aₓ=a₁+(x−1)d.
a1=22 because that is the first row.
d is 2 because that what is being added to all
x is the number of rows

aₓ is the number of seats in row x

270=22+(x-1)2
270=22+2x-2

270=2x+20
250=2x

125=x

Other Questions