Answer:

Step-by-step explanation:
We are going to use the identity
because this identities right hand side matches your expression where
and
.
So we have that
is equal to
.
Part A you would use 200-L ( since you have 400 feet total 200 feet would equal length plus width)
Part B 200 - 80 = 120
Part C 200-90 = 110
area = 90 x 110 = 9900 square feet
The answer is B. CD=KL, DE=LM, EF=MN, and so on
Answer:
B) 40 necklaces with 25 left over
Step-by-step explanation: