Hey there, Dudedan!
In a#b = a+2b, we have the first term, a, plus 2 times the second term, b.
Let's try that with 3#4.
3#4 = 3+2(4) =
3 + 8 = 11.
Hope this helps!
The answer is D (42.39 cubic inches)
I think it is gonna be 2:7
9) x= -6
10) x= 3/2
11) x= -4,0,5
12) no solution
Answer: SAS
Step-by-step explanation: