Theorem
In a triangle, the measure of an exterior angle equals the sum of the measures of its two remote interior angles.
x + y = z
4n - 18 + n + 8 = 133 - 6n
5n - 10 = 133 - 6n
11n = 143
n = 13
z = 133 - 6n = 133 - 6(13) = 133 - 78 = 55
Answer: C. 55
Equating the two formulas for f, you have
n/12 = f = 3y
Then multiplying by 12 you get
n = 36y
This formula converts yards (y) to inches (n).
2/5 in a decimal form= 0.4
2/5 in a percentage form= 40%
Hope this Helps!
