Well for 5 movies, you do f(5) which is 32. So take 12 away from that because she already has 12, means that she still needs $20.
I got 1:4
What I did was added all the catfish samples which was 15. Then I added all the samples together and got 60. I then put them in the ratio and simplified them.
15:60
1:4
I might be wrong but I think it's 50 minutes.
$0.10 x 50min = $5
$20 + $5 = $25
$0.20 x 50min = $10
$15 + $10 = $25
So, it's 50 minutes.
6x+15-4
6x+11
Hope this helps
