The choir director set up chairs for the concert with an equal number of rows and columns. The number of chairs in each row and column is represented by \( y \), where \( y \) is the total number of chairs. What is the number of chairs in each row and column if \( y = 81 \) chairs?

'y' is NOT the number of chairs in each row and column. It's the TOTAL number of chairs, so it's the product of (chairs in each row) times (chairs in each column). The problem says that those numbers are equal. So we would expect the TOTAL to be a perfect square, and the number in each row and each column to be the square root of the total. Since the total is 81, the number in each row and column could be either +9 or -9 . Both answers are mathematically correct, but -9 doesn't make sense in the real world. So we know that +9 is the real answer.

Answered by AL2006 | 2024-06-10

'y' is NOT the number of chairs in each row and column. It's the TOTAL number of
chairs, so it's the product of (chairs in each row) times (chairs in each column).
The problem says that those numbers are equal. So we would expect the TOTAL
to be a perfect square, and the number in each row and each column to be the
square root of the total. Since the total is 81, the number in each row and column
could be either +9 or -9 . Both answers are mathematically correct, but -9
doesn't make sense in the real world. So we know that +9 is the real answeR. ;

Answered by sophiasernaarias23 | 2024-06-13

The number of chairs in each row and column, given that the total number of chairs is 81, is 9 because 9 × 9 = 81 . This is found by taking the square root of the total number of chairs. Therefore, both rows and columns consist of 9 chairs each.
;

Answered by AL2006 | 2024-10-09