Answer:
22.5
Step-by-step explanation:
y=kx
20=k15
k=1•33
30=1•33x
x=22•5
Here !!!!!!!!!!!!!!!!!!!!
The better buy should be buy twelve cans for 7 dollors
Given that,
- twelve cans for7 dollors or 6 cans for 4 dollors.
Based on the above information, the calculation is as follows:
The first option is

= $0.58
The second option

= $0.67
Learn more: brainly.com/question/16911495
Answer:
y=12x+10 or f(x)=12x+10
Step-by-step explanation:
If it costs $12 per month to rent as many movies as you want, then that can be represented as 12x
Since $10 is a flat fee and doesn't change, this gets added seperately to 12x
Thus, the final equation is y=12x+10 or f(x)=12x+10
Hope this helped!