Answer:
126°
Step-by-step explanation:
(2x +18)° = (3x)°
2x + 18 = 3x
18 = 3x - 2x
18 = x
therefore, (3x)° = (3*18)°= (54)°

Answer:
3
Step-by-step explanation:
Answer:
45 cm
Step-by-step explanation:

Answer:
The first one is the only one in simplest form.