exam Maths Puzzle Numerical Ability

How do you simplify the equation -w=14?

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exam Other Question

Two airplanes leave an airport at the same time. The heading of the first is 120 degrees and the heading of the second is 320 degrees. If the airplanes travel at the rates of 700 mph and 600 mph respectively, how far apart are they after an hour? For 0 degrees < x < 90 degrees, how many solutions are there for the equation 2 sin x = cos X?