exam Maths Puzzle Numerical Ability

3x+1<-2or 2x+3>5

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I'm looking for help please

If you invest $5,000 paying 9%, to the nearest penny how much will you have in 25 years if it is compounded:

25. semi-annually

26. continuou
I can't seem to figure this problem out correctly:

(7 * 2y - 6xy + 3y^2) - (6x^2y - 7^2)

What I have so far is:

(14y - 6xy + 3y^2) - (6x^2y - 7^2)

How is this problem w