Part B: It would be 8x+24. You get 4x+12 and double(times 2) it, it would be 8x+24.
Part C: Yes, because the relationship between the ratio would always be proportional.
<span>Well the third and last option are not rational, since all angles are not right angles, and just because they are comp does not mean they are congruent.</span>
The answer is a. elements