Downloaded Photomath it’s going to help you a lot, and show you step by step, also it’s free.
Addition: negative four plus negative four plus negative four equals negative twelve
Multiplication: negative four times three equals negative twelve
Division: twelve divided by 3 equals negative four
It would be 3 hours. This is 3 hours because the problem says that daniel takes 9 hours to clean and office building and mark takes 6 hours so if you subtract 9hours from 6 hours it would be 3 hours total. Now this can be 2 answers it can also be 15 hours if you were to add 9 hours to 6 hours.
It is equal to 26 if you didn’t understand you can ask more questions and I’ll help
Answer:
It is not a function because the output of 9 repeats.
(1,9) (4,9)
:D
