Answer: 2
Step-by-step explanation:
Answer:
a)60, b)14580, c)20*3^n
C. x=42
16 + 3x + y = 180
126 + 16 + y = 180
y = 38
16 + 3x + 38 = 180
54 + 3x = 180
3x = 126
x=42