Answer:

Step-by-step explanation:



Answer:
or 
Step-by-step explanation:

(if the question is asking for the simplified form , it is 
Answer:
4
Step-by-step explanation:
this line is congruent to EC on the base
Answer:
Area = 50.24 feet^2
Step-by-step explanation:
radius = 4 feet
Area =?

Substitute values into the given equation

First line because 4(2a+1)=8a+4 and 9a+4-(8a+4)= a
Second line because a times 2 =2a and 2a+1-2a=1
<span>Although the second equality is more or less obvious since 2a+1 leaves a remainder of 1 when divided by a.</span>