Answer:
2.84
Step-by-step explanation:
20.00 - 17.16 : If you think of it with zeros it might help
2.84 when solved
The axis of symmetry would be -3 because it is always the (x) of the vertex
The average is 2. To find the average you add all the numbers then divide the sum by the total amount of numbers.
Central angle is 130
Semi circle is BED and BCD
Major arc is CEB
Measure BAC is 130
BEC is 230
Let's consider that number to be 'x'..
So, twice the number (2x) is 12 greater than than the half of the number.
So the equation will be like,
2x=12+x/2
Solving this further,
2x=(24+x)/2
=> 4x=24+x
=>4x-x=24
=>3x=24
=>x=8..
So the number is "8".