Answer: Holly would take 60 minutes to clean alone.
Step-by-step explanation:
Let t = Time taken by Holly to clean alone.
Given: Time taken by Mia to clean alone = 30 minutes
Time taken by Mia and holly to clean their room = 20 minutes
Then,

Hence, Holly would take 60 minutes to clean alone.
Answer:
You need a common denominator.
Step-by-step explanation:
3/4+2/3
9/12+8/12
Answer:
You would pay 9 dollars because 4 times 3.5 is 14. If you subtract the 5 dollars from the gift card you're only paying 9 dollars out of pocket
Well 1 + 2/3 so we want to have 2 fractions and 1 = 3/3 so 3/3 + 2/3 = 5/3 and then we convert it into a whole fraction which = 1 2/3