Four because 90+90+90+90 = 360, which is the angle f a circle
19.) Least to greatest:
Luxembourg
Singapore
Australia
Egypt
Brazil
Answer: x=75
Explanation:
x+10+x+20=180
combine like terms
2x+30=180
subtract 30 from each side
2x=150
divide each side by 2
x=75
Answer:
the second one on the top right
Step-by-step explanation:
