Answer:
57.0°
Step-by-step explanation:
180° - 123° = 57°
I did 180 because it is a supplementary, meaning that the angles add up to a straight angle (180°).
DF = 3
m<B = 28 degrees
Hope that helps!
Plug 10 in for y.
10=2x-2.5
Add 2.5 to both sides.
12.5=2x
Divide both sides by 2.
6.25=x
Hope this helps! :)
