Answer:
perimeter = 3y + 7 cm
Step-by-step explanation:
perimeter = y + y + y + 5 = 3y + 7 cm
As a mixed number, that would be 4 2/4, or 4 1/2 simplified.
I hope this answer helped you! Feel free to ask me any more questions if you need help! :)
First off, let's convert the mixed fractions to "improper", keeping in mind that the water is increasing every passing hour by 1 and 1/4.