Answer:
D. 
Step-by-step explanation:
Given the expression:

divide by the common factor to have;
= 
= 
= 
Rationalize the denominator, we have;
x 
So that,

Thus,
= 
The correct option is D.
Answer:
The answer is 7.5.
Step-by-step explanation:
Since we're looking for half of 15, divide 15 by 2 (or multiply 15 by 0.5, it's the same thing) and you get 7.5.
I hope this helped! :)
Answer:
d
Step-by-step explanation:
Answer:
There are no solutions.
Step-by-step explanation:
I know that the factors of 12 are 1, 2, 3, 4, 6, and 12
Therefore, the possible roots are 1, 2, 3, 4, 6, and 12