if you mean
then it's c. 8, -7/3
but if you mean
then it is
180°
step-by-step explanation:
sum of equilateral triangle=180°
< n=60°
< m=120°°[angle supplementary of equilateral angle]
< m+< r+< x=360°(sum of exterior angle of triangle)
its c
perpendicular to x*4 means it's y = -1/4*x+k
so for y = 7 and x = 2
we have 7 = -1/4*2 + k so k = 7.5
so the equation is y = -1/4x + 7.5