Answer:

Step-by-step explanation:
Just Square the numbers like a normal equation.
4² = 16
9² = 81
This gives us 
or 0.198 as a decimal (approx)
The answer is 3/4. You divide both numbers (54 and 72) by 18 and you get 3/4. Hope it helps!
True because you do not include the number if the circle was open.
F(x) = 3x-6
add 6 to each side
6=3x
dived each side by 3
2=x