Question

A college lecture hall has 15 rows of seats. The first row has 18 seats the next row has 20 seats, and the third row has 22 seats.

How many seats are in the last row?

Write the rule for the number of seats in the nth row.

Answer 1

Answer:46, f(n)=2x+16

Explanation:

1=0+18

2=2+18

3=4+18

4=6+18

f(n)=2x+16

f(15)=30+16=46