Answer:
See below.
Step-by-step explanation:
12 large water bottles for $9:
[tex]9/12=.75[/tex]
How many water bottles would cost 3$:
[tex].75*4=3[/tex]
[tex]3[/tex] water bottles would be $3.
How much would it cost for 1 bottle water:
Like shown above: [tex]9/12=.75[/tex]
[tex]0.75[/tex] would be the cost of one water bottle.
How much would it cost for 7 bottled waters:
[tex].75*7=5.25[/tex]
[tex]5.75[/tex] would be the total amount for 7 water bottles.
:)
