To find the amount of student in a row, we need to recall that the number of students is equal to the number of rows. All together there are 64 students.
This means that a number times itself must be 64. The only number times itself which equals 64 is 8.
There is an infinite n umber of systems of equations that has (1, 4) as its solution. Are you given choices? Try x = 1 and y = 4 in each equation of the choices. The set of two equations that are true when those values of x and y are used is the answer.
