Answer:
4u²
Step-by-step explanation:

Common factors cancel from numerator and denominator. The one factor that might make the expression undefined is given as non-zero, so no additional restrictions apply.
Answer:
C. 21/50 because 21/50 written in a decimal is 0.42
The correct answer is: Option 3: 
Step-by-step explanation:
Given

We have to find

This will be equal to:

So we have to find the composition of (fog)(x) first

Now,

The correct answer is: Option 3: 
Keywords: Composition, Functions
Learn more about function composition at:
#LearnwithBrainly
Answer:
(x+4)^2 =0
Step-by-step explanation:
x2 +8x+16=0
What 2 numbers multiply to 16 and add to 8
4*4 = 16
4+4 =8
(x+4) (x+4) =0
(x+4)^2 =0
I would subtract the 2nd from the first one
so -4x - -2x = -2x
4y - 4y = 0
-20 - -2 = -18
-2x = -18
now I would divide that by -2 to get the value for x
so no we have x = 9
now you just have to substitute that into one of the equations and simplify to get y
-2 X 9 + 4y = -2
-18 + 4y = -2
4y =16
y = 4