The front row of an auditorium has 10 seats. There are 50 rows in total. If each row has 2 more seats than the row before it, which expression gives the total number of seats in the last row?

A) 10 + 2(50 - 1)
A 10+ 2(50)
C) 50(10 + 2)
D) 10 + 2^50

10+2(50-1)

Step-by-step explanation:

This is an arithmetic sequence

We know the first term a1 = 10

The common difference, d = 2

an = a1+d(n-1)

We want to find the number of terms when n = 50

a50 = 10+2(50-1)

answer: idk

step-by-step explanation:

3; 9 is 8 to -4

step-by-step explanation: