Question

1. Ana was washing dishes at the end of her shift at a restaurant. She washed 30 plates from 7:30 to 7:35. When she finishes washing all the plates, her shift will end.

(a) If she started washing plates at 7:15 and ended at 7:38, estimate how many plates she washed in total. Explain your reasoning.
(b) Write an equation to represent how many plates Ana has left to wash at a particular time after her start at 7:15. Explain your reasoning.

Answer 1

she washed 30 plates from 7:30 to 7:35.....so she washed 30 plates in 5 minutes.....30/5 = 6 plates per minute

so if she started washing plates at 7:15 and ended at 7:38...how many plates did she wash....
from 7:15 to 7:38 is 23 minutes...and if she can wash 6 plates per minute, then in 23 minutes, she can wash (23 * 6) = 138 plates <==

the equation...
y = -6x + b...with b being the number of plates she started with and x being the number of minutes and y being the plates she has left to wash...I am not 100% sure on this equation...I am so sorry