exam Maths Puzzle Numerical Ability

I got to find the slop of the line through the following pairs of points



(-5 , -3 ) and (-5, 2)

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exam Other Question
John can solve 12 linear equations in just 20 minutes. at this rate how many can he solve in 1 hour a plane is flying from NYC to SF. It normally flies 300 mph. there is 30 mph wind heading west to east. How long does it take to fly 200 miles to SF and how long does it take to fly 200 miles back to NYC