Ray. A line continues in two directions, a segment is finite, and an angle is (theoretically) two rays.
One is -10,and second is 30.
1 inch =<span> 0.0277778 </span>yards.
y= <span>0.0277778x if you need an equation</span>
we have the numbers

we know that
The sum of a number and its additive inverse is 0
so

therefore
the number n is equal to 
the sum is equal to zero
the answer Part a) and Part b) in the attached figure
I think the answer is 54 to question B but don't take my word for it.