What does the median of a data set mean

What is the answer to |-2x-5|-|-4+8| and x=7

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?