Question

really stuck on this one :/ the seats at a local baseball stadium are arranged that teach row has 5 more seats than the row below it. if there are 4 seats in the first row, how many are in row 23?

Answer 1

we have a difference of +5 between rows right?

Answer 2

115

Answer 3

r1 = 4
r2 = 4+5
r3 = 4+5+5
r4 = 4+5+5+5 = 4 + 5(3)

rn = 4 + 5(n-1)

Answer 4

4+5(x-1) should get you the answer so for row 23 we have 114

Answer 5

115

Answer 6

r23 = 4 +5(23-1)
= 4 +5(22)
= 4 +110
= 114

Answer 7

its only 115 if you count them by hand and lose track :)

Answer 8

Thank you so much!~~~!!