Answer:
Children - 327
Adults - 318
Step-by-step explanation:
You can use a matrix in a graphing calculator for this or use another systems method to determine these values.
Make the following augmented matrix:
[tex]\left[\begin{array}{ccc}1.75&2.50&1367.25\\1&1&645\end{array}\right][/tex]
Find the rref of this and you should get the following:
[tex]\left[\begin{array}{ccc}1&0&327\\0&1&318\end{array}\right][/tex]
