Acertain theatre is shaped so that the first row has 23 seats and, moving towards the back, each successive row has 2 seats more than the previous row. if the last row contains 81 seats and the total number of seats in the theatre is 1560, how many rows are there?

There are rows in the theater.

Step-by-step explanation:

Given terms.

Seats in order will form an Arithmetic progression.

As the common difference ,same for three consecutive terms so this an AP.

Now accordingly we can put the AP terms.

Total number of seats

Seats in the first row

Seats in the last row

Summation of terms in AP

OR

Using the second equation.

So the number of rows (n) in the theater

1. 34

2. 268

3. x=14.4

step-by-step explanation:

step-by-step explanation:

there are 36 inches in a yard

25 : 36 = 0.69 yards (you can round to 0.70)