2 × 2 = 4 ;
x^9 × x^4 = x^13 ;
y^7 = y^7 ;
z × z^3 = z^4 ;
<span>(2x^9y^7z)(2x^4z^3)
=4x^13y^7z^4 ;</span>
Answer:

Step-by-step explanation:
Explained all in my picture
The independent variable would be the percent rates/unemployment rates because they change. The dependent variable would be the years... i think
In this question it is given that the values of CD and CE are 20 and 32 respectively.
Since the length of CE is greater then of CD, so C and D could not be the end points.
Therefore, either D and E are the endpoints or C and E are the endpoints.
If D and E are the endpoints, then DE is the sum of 20 and 32 which is 52.
And if C and E are the endpoints, then DE is the difference of CE and CD that is 12.
So the possible values of DE are 12 and 52.