exam Maths Puzzle Numerical Ability

A ship is heading due northwest at 15 mph in a river that flows east at 7 mph. What is the magnitude and direction of the ship's velocity relative to the Earth's surface?

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A department store is planning to hire up to 24 temp. employees for a tent sale. Expierenced workers will be paid $20 per hour and inexperienced workers $15 per hour. The company c need a system of equations for this prob: an airplane flew 4 hours against a wind of 40 km/h. on return he was flowing with the wind and flight was 3 hours. whats speed of airplane in still air.