Answer:
The choose first.

Step-by-step explanation:

I hope I helped you^_^
use 
to get 
then use
and 
also, 
to get 
then again use the first identity In both pairs, i.e.

to get 
multiply and divide by 4 to get the RHS.
because, 
squaring both sides, 
9 x 5 - 3 x 1
45 - 3 = 42
answer: 42
Answer:
solve for each variable then plug them in
Step-by-step explanation:
Answer:
B. Add 2/5 to both sides
Step-by-step explanation:
Yuu have to add because it says subtract. inverse operations