The class would begin at 8:40 but since you said make 745 even u take 45-30& get 15 then add that to 745 and 10
Answer:
78 emails
Step-by-step explanation:
Given
Represent sent emails with x and received with y.
So, we have:
-- First statement
-- Second statement
Required
Determine the number of emails received (y)
Make x the subject in 

Substitute 114 - y for x in 

Open bracket

Collect Like Terms


Divide by 3


12m; if one side is 9m then that means 42 - 9 - 9 would yield the size of the two remaining sides together. 42-18=24 24 divided between the two sides left means each remaining side had to be 12m