book Maths Puzzle Numerical Ability

y=x-9 (7,10) find the point for a slope

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book Other Question

ay + 3a + 2y + 6 / ay + 3a + 5y + 15 A boat travels at the speed of 20 Miles per hour in still water. It travels 48 miles up stream, and then returns to the starting point in a total of five hours. The speed of the current is ____ miles per hour.