The supplementary angle would be 180 degrees, and the other angle would be 92.2 degrees
Given:
Cost of 1 digital song = $1.05
Cost of 2 digital song = $2.10
Cost of 5 digital song = $5.25
To find:
The equation and the cost of 25 downloaded digital songs.
Solution:
Let us take two points (1, 1.05) and (2, 2.10).
Here 
Slope:


m = 1.05
Using point-slope formula:



Add 1.05 on both sides, we get

Here x is the independent variable and c is the dependent variable.
So that substitute x = n and y = c.

The equation is c = 1.05 n.
Substitute n = 25 in the equation.


The cost of 25 songs is $26.25.
Answer:
It's an Irregular Quadrilateral
Step-by-step explanation:
It has 4 sides and the length of the sides of the Quadrilateral is not equal. This makes it irregular.
Don't quote me on this because i am not a master at math but im pretty sure its yes because it is a rising by the same values every time it passed through a point on the graph