Answer:

<h3>4th answer is correct</h3>
Step-by-step explanation:

The answer is C
Explaining:
Answer: 11.4
Step-by-step explanation:
change to numbers 
simplify 
Answer:
7
Step-by-step explanation:
let the no. be 'x'
By question,
2x-8=6
or, 2x =6+8
or,2x = 14
or,x = 7
therefore, the no. is 7.
We can do this easily using 0s.
(x - i) (x + i) (x + 4) (x - 1) = 0
If you plug in any of the numbers, you'll get 0, making the equation true.