The seats at a local baseball stadium are arranged so that each row has five more seats than the row in front of it. If there are four seats in the first row, how many total seats are in the first 24 rows?

These are the choices
1,476
2,856
2,952
1,428

Question

The seats at a local baseball stadium are arranged so that each row has five more seats than the row in front of it. If there are four seats in the first row, how many total seats are in the first 24 rows?

These are the choices
1,476
2,856
2,952
1,428

anonymous · Answer

מumbers of seats in a row makes an arithmetic series
chairs in the nth row
an = 4 + 23*5 = 119
and the sum is
sn = (4 + 119) * 24/2 = 1476

anonymous · Answer

ok..I got..thanks for showing work..