Answer:
-9x-4x=-13x
Step-by-step explanation:
They both already have the same variable, so you would solve it like any other subtraction problem and put the x at the end.
Answer: The answer is A, 8 mm.
3rd one is correct.
5*5*5= 5³.
f(x)=2(x-4)^2 = 4±√x/√2