<span> the answers are ...C. 16x – 4 and D. 4(4x – 1) ...
Hope it helps !!!</span>
The problem is:

We now do L.C.M. of numerator and add, also do L.C.M. of denominator and add together:

Dividing by a fraction is same as multiplying by its reciprocal, so we have:

x cancels out, so can multiply and write:

This is the simplified form.
ANSWER: 
Step-by-step explanation:
As we have to use the number 0-6 once to make 2 equivalent ratios.
so lets solve the problem.
Determining first equivalent ratio
as
and
so
Therefore, first equivalent ratio

Determining second equivalent ratio

as

and

Therefore, second equivalent ratio

This is college? Woah I'm not advanced. Middle school!
It should be the square root of 2 (~1.141)