Answer:
A is true but I dont know the rest I am very sorry .-.
Step-by-step explanation:
I Just added 18 + 12 = 30 + 10 = 40 and that is why A is true
Answer:
or <em>0.35</em>
Step-by-step explanation:

Now simplify.
= 
XY - X + 2Y -2 =X(Y-1) + 2(Y-1) = 2X(Y-1)
Answer:
x = y = -2
Step-by-step explanation:
Hope this helps
Answer:
6 hours
Step-by-step explanation: