12 years. That is the most representative because it's the median.
By solving the inequality we get 
What is graphing the inequality?
The act of illustrating which area of the number line contains values that will "satisfy" the specified inequality is known as graphing the inequality. Take a look at the first inequality, "x > -5." The numbers that can be used to substitute x in our inequality to produce a true statement can be shown on a graph of our inequality.

Dividing above equation by 3 we get,

Graph of
is
Therefore by solving the inequality we get 
To learn more about graphing the inequality from the given link
brainly.com/question/24372553
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Answer:
D. 4 x -2 - 7/8
Step-by-step explanation:
4 x -2 7/8
2 7/8 can be separated into 2 pieces 2 +7/8
4x - (2+7/8)
Distribute the minus sign
4x - 2 -7/8
N = number of given days
p = photos on phone
p - (20n) =