Step-by-step explanation:
I assume we are simplifying
1) -6k+7k = k
2) 12r-8-12 = 12r-20
3) n-10+9n-3 = 10n-13
4) -4x-10x = -14x
0.5, 0.05 is 1/10 the value of 0.5
We have that
using a graph tool--------------> graph the <span> cosecant function
</span>see the attached figure
the answer is the option B