The experienced window washer can wash all the windows in Mike’s house in 2 hours, which implies that in 1 hour he completes 1/2 of the job.
By the same logic, the new trainee completes 1/7 of the job in one hour.
If they work together, they complete
![\dfrac{1}{2}+\dfrac{1}{7}=\dfrac{7}{14}+\dfrac{2}{14}=\dfrac{9}{14}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7D%2B%5Cdfrac%7B1%7D%7B7%7D%3D%5Cdfrac%7B7%7D%7B14%7D%2B%5Cdfrac%7B2%7D%7B14%7D%3D%5Cdfrac%7B9%7D%7B14%7D)
of the job in one hour, meaning that they complete the job in 14/9 of a hour.
Answer:
A. complementary
Step-by-step explanation:
Complementary is when 2 angles add up to 90°. Therefore, the angle in the image shown is a 90° angle. Hope this helps :)
The answer would be -6n+2mn-25pn