Find the mean of the set

17.2 18.3 14.9 16.8 15.3

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

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Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2