Data:
Child ticket: c
Adult ticket: a
c= $4
a= $6
x = number of child tickets
y= number of adult tickets
As Jeff has to sell the tickets for at least (greather than or equal to) $50
The function that represents this situation is:
[tex]\begin{gathered} cx+ay\ge50 \\ 4x+6y\ge50 \end{gathered}[/tex]