book Maths Puzzle Numerical Ability

Find And Equation To the line containig the point (5, -8) and perpendicular to the line 5X-4Y=-12

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book Other Question

Rita rows 12 km upstream and 12 km downstream in 3 hours. The speed of her boat in still water is 9 km/hr. Find the speed of the stream. multiply r2 + 7r + 10/ 3 by 3r - 30 / r2 - 5r - 50. thank you!!