exam Maths Puzzle Numerical Ability

Given vectors a={7,4} and b={2,3}. Find 2a-b.

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exam Other Question

A.a rectangular field measures 110 meters by 70 meters.how many laps around the field must sarah got to run 2.3 kilometers? B.A JOGGING TRAIL HAS SIDES THAT MEASURE 180 METERS ,192 airplane 1 travels 500 mph ; airplane 2 travels 600 mph ; airplane 2 leaves 30 minutes after airplane 1 ; at what time will airplane 2 catch airplane 1 ?