exam Maths Puzzle Numerical Ability

simplify

x^2+2x+1/3 / x^2-1/x

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exam Other Question

number 8 on page 438 of my book.

x-2y<-6
5x-3y<-9 A sailboat travels 20 miles downstream in 3 hours. It returns in 4 hours. Find the speed of the sailboat in still water and the rate of the current.