Factor by grouping.
7ax−7bx−2ay+2by

Here's the steps for factoring by grouping:

This is far as this expression can be factored. Let me know if you need any clarifications, thanks!

D.

Step-by-step explanation:

I did: 18+(1.2 x 15). I got 36. So i know that in 15 hrs. It will be 36 degrees. But recess will most likely be over by then. So i switched out the number 15 for each time. In 11 hrs (so it would be 11am) them temperature would be 31.2. So its would be too cold. In 11.5 hrs (11:30am) it would be 31.8. Still too cold. I tried 12 hrs (12pm), I got 32.4, which is still too cold. So D is the correct answer becuase when I tried 12.5 hrs. (12:30pm) it would have been 33 degrees outside.