Step-by-step explanation:
Answer: Yes, The relation is a function, they are the exact opposite.
Step-by-step explanation:
I’m pretty sure it’s 9/10 - 2/5. I’m sorry If it’s wrong
The rate a computer works is 1/time. Working together, you add the rates.
Let new computer be x, old computer be y.
x = y - 7

Rounded to nearest tenth gives:
x = 23 hours