Answer:
The coefficient is 
Step-by-step explanation:
The given sum is

We can choose to add only the coeffients of
or simplify the whole sum.

We collect the LCM for the
terms;

This will give us;

Which is the same as

The coefficient is 
Answer:
36.575
Step-by-step explanation:
you need to find line ab you can do
for the triangle and get the line you also need to get the squar root of it as it is still squared then devide by 2 to get the rades then times that by pi and there you go you have the area also sorry for spelling I love math not English
It’s - ( - 3 ) because a negative times a negative equals a positive so it wouldn’t be - ( 3 ) because it would turn into a negative number and - ( - 3 ) would be positive