All the sides add like a rectangle with two sides measuring 4 and two measuring 2 so you would add 4+4+2+2=12
A = 9 (Sorry I can't do the other ones, I haven't learned those ones yet) Hope this helps!! :P
Y = 3/4x - 5/2....subtract 3/4x from both sides
-3/4x + y = -5/2 ....multiply everything by common denominator of 4
-3x + 4y = -10
Answer:
I'm pretty sure it's 13.
Step-by-step explanation: