It's the first option, I'm pretty sure.
Hope this helps!!
4x + 1 → C
(f + g)(x) = f(x) + g(x) = 3x - 1 + x + 2 = 4x + 1
Answer:The pair of angles must be supplementary are ∠2 and ∠5.
The correct option is (B)
What is supplementary angle?
Two angles are called supplementary when their measures add up to 180 degrees.
Given that:
∠2=90 and ∠5=90
So,
∠2+∠5
=90+90
=180
Hence, angle 2 and 5 makes supplementary angles.