Answer:
-2
Step-by-step explanation:
You make x= -3 then you insert it into the problem which is x= 2(-3)+4
2 times -3 is -6 which then you would get
-6+4 which equals -2
Answer:

Step-by-step explanation:
Rolling a even: 
Coin on heads: 
×
Well 6×12=72. I don't know what the original tank size was but subtract the original from this one to get your answer.
answer is 0 because -6+6 is 0