A. -5 i think it is the right answer
Answer:
-9
Step-by-step explanation:
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.
F(-6) = 2(-6)+15(-6)-2 = -12-90-2 = -104