exam Maths Puzzle Numerical Ability

I am Just having problems on everything in math and i dont get it...im in algebra one and dont get anything...ive failed it once and im in the 10th grade and im failing it again and need help!! please say you can help me!

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exam Other Question

Suppose that N=squareroot(x)+3 models the number of cases of an infection, in millions, of a disease x years from now.Approximately how many cases of the infection will there be 9 years from now? approximately how many years will there be 5 million cases Solve the open sentence and graph the solution set.

|x-5|=8