Answer:
1) 112°
3) 55°
4) 51°, complementary angles
Step-by-step explanation (question one):
3x +10 +2x = 180
3x +10 +2x -10 = 180 -10
3x + 2x = 170
5x = 170
x = 34
3(x)+10 = angle ABD
3(34)+10 = angle ABD
102+10 = angle ABD
angle ABD = 112°
Step-by-step explanation (question two):
180 -70 = 2x
110 = 2x
55 = x
angle SQT = 55°
Step-by-step explanation (question three):
Since it's a right angle, we can simply subtract.
90 -39 = 51
angle b = 51°
I wish you luck on your homework!