Answer:
42 degrees
Step-by-step explanation:
"Complementary" means the angle measures add up to 90 degrees.
[tex]m\angle A+m\angle B =90^\circ\\(x+28)+(4x-8)=90\\5x+20=90\\5x=70\\x=14[/tex]
Now plug in 14 for x in the expression for the measure of angle A.
[tex]m\angle A = 14^\circ+28^\circ =42^\circ[/tex]
