exam
Maths Puzzle
Numerical Ability
An airplane flew for 4 hours with a 20-km/h tail wind. The return flight against the same wind took 5 hours. Find the speed of the plane in still air.
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exam Other Question
Solve for the indicated variable:
3x +4y=-2 FOR y
y = mx + b FOR m
Plot the point with coordinates (-4, 0)