Examine the intersection of these lines:

∠b and ∠c are complementary angles.
∠e and ∠f are complementary angles.
which of the following other pairs of angles are complementary? select all that apply.
∠a and ∠c
∠b and ∠f
∠c and ∠d
∠f and ∠e
∠d and ∠f

Step-by-step explanation:

∠C and ∠F are vertical angles, so are congruent. Then any angle complementary to one of those will also be complementary to the other.

Likewise, ∠B and ∠E are vertical angles and congruent. Any angle complementary to one of them will also be complementary to the other. Here, ∠E and ∠F are listed as complementary, so we know ∠B and ∠F will be also.

point slope form

y-y1=m(x-x1) where

m=slope and you are given a point (x1,y1)

slope=-5

point is (2,-1)

x1=2

y1=-1

m=-5

so

y-(-1)=-5(x-2)

y+1=-5(x-2) is answer