A step by step would be nice.
what does y =

Answer:
y=42°
Step-by-step explanation:
We see the big triangle is split into 2 triangles.
The lower triangle is composed of 90°, 48°, and y.
since the angles must add to 180°,
180°-90°=90° 90°-48°=42°
y=42°
Check:
42+48=90
90+90=180°
Please give brainliest if possible.