Answer:
45
Step-by-step explanation:
x + x + 2x = 180 {Sum of angles of a triangle}
4x = 180 {Divide both sides by 4}
x = 180/4
x = 45
Answer:
Area of the circle = 
Step-by-step explanation:
Radius of the circle= 
Area of the circle= 
As,

Area of the circle is:

The Area of the circle is : 
Answer:
Your answer will be C. $5.79.
Step-by-step explanation:
To get this answer, you have to take the original price (3.99) and multiply it by the mark up (45%)
3.99x0.45=1.79
Then, you add 3.99 and 1.79 to get your final answer.
3.99 + 1.79 = 5.78
The answer is off by one penny, BUT, it's tricky to get it exact when you're working with decimals and percentages.