Total money with Connor = $22.50
He bought a hotdog for = $ 3.75
Money left now = 22.50-3.75=$ 18.75
No with this $18.75 Connor will buy tickets costing $1.25 each
So, total tickets he can buy are = [tex]\frac{18.75}{1.25}=15[/tex]
For establishing inequality :
Let the number of tickets purchased be = r
Inequality becomes
[tex]3.75+1.25r\leq22.50[/tex] where r = 15