4 is the nearest integer
as a decimal this number would be 3.5, which would round up to 4.
External angle is equal to the sum of the other 2 internal angles
2x=x-5+63
minus x from both sides
x=-5+63
x=58
x=58°
if you are looking for the slope the answer would be y=4/7x+25/7
Easy it's like regular subtraction
-2 -2=-4 if it's the same sign you add
-2+4=2 different is subtract
I wasn't taught this specifically, but I would think that it would mean two ratios are involved with the same problem, just like it says.
