book Maths Puzzle Numerical Ability

find the slope of a line through the points (-2,-1) and (4,2)

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book Other Question

Multiply (X2Y2)(X2Y)
A) 4X2Y B) XY2X2Y C) 2X2Y2Y D) X4Y3 Gary runs 1 km/h faster than Margie.
They run in opposite directions for 2 hours.
They are then 30 km apart.
How many km/h does Margie run?