Please help, I am just so bad at this specific subject. I cannot get the hang of it, it's just so trippy to me.

Answer:
142°
Step-by-step explanation:
The angles of 38° and m<7 both make supplementary angles which equal to 180. Subtract 180 by 38.
Answer:
142
Step-by-step explanation:
Line M is a straight line. All straight lines have an angle measurement of 180 degrees.
m<7 + 38 = 180 Subtract 38 from both sides.
m<7 + 38 - 38 = 180 - 38
m<7 = 142