exam Maths Puzzle Numerical Ability

please help me solve this problem (11r+60=16)

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exam Other Question

Given f(x)=5xsquared-3x+1, find f(x-2)

I came up with x= -25 Solve the open sentence and name and graph the solution set. Please and thank you, to I can have a clear understanding of what I am doing.

|3k+4|≥8