7. If it takes 2 gardeners 6 hours to landscape a garden, how long would it take 3 gardeners? 12

8. Question 7 is an example of...

Direct proportion
Inverse proportion​

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b