SOLUTION: when the children in a school were arranged for a mass drill in equal rows . there were 5 rows more than the children in each row. if the roll call that day was 750. find the numbe

Question 1073712: when the children in a school were arranged for a mass drill in equal rows . there were 5 rows more than the children in each row. if the roll call that day was 750. find the number of rows formed.
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
THE FIFTH GRADE FACTORER says
.
There were children in each of rows.

THE ALGEBRA STUDENT says
Let be the number of children in each row.
Then, is the number of rows, and
is the number of children in school that day.

Using the quadratic formula to solve that quadratic equation,

The two solutions to that equation are
and
.
Since the number of children in each row cannot be a negative number.
is not a solution of the problem, so ,
and the number of rows is .
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