Answer:
12
Step-by-step explanation:
12 +30= 42
42+12=54
Answer:

Step-by-step explanation:
hope this helps.
1 and one - twelfth
because 12gies 3 times in 37
A)106°- angle at the centre is half of the angle at the circumference
b)74°- when a tangent meets a radius a right angle is created(90+90+106)= 286 360-286= 74°
3t+12-4t-6=-4
-t=-4+6-12
-t=-10
t=10
That's your answer.