Answer:60%
Step-by-step explanation:
Discount 160-64=96
use proportion to find out %
160:100=96:x
160x=9600
x=9600/160
x=60%
An identity, in mathematics, is a relation between A and B that would result to an equality of the two. It should be expressed as A = B wherein both values has some variables that would produce the same value no matter what will be the values used for the two functions. We are given the equation as follows:
a(2x+3)=9x+15+x
To determine the value of a that would make this equation an identity, we assume a value for x. We can assume a value of 1. We do as follows:
a(2 + 3) = 9 + 15 +1
5a = 25
a = 5
Therefore, the value of a would be 5.
General Idea:
The measure of one of the central angles of a regular Polygon () can be used using the below formula:
Applying the concept:
The measure of one of the central angles of a regular octagon.
The octagon have 8 sides, using the above formula we get...
Conclusion:
The correct option is <em><u>A) 45 degrees</u></em>