exam
Maths Puzzle
Numerical Ability
graph 5x+y<=5
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Can you please help me solve this word problem:
An airplane traveling at 450 mph enters a region with a headwind of 25 mph. How long will it take the plane to travel 950 miles into this wind?
suppose x is equal to ab over a plus b and y is equal to ab over a minus b, show that y squared minus x squared all over y squared plus x squared is equal to 2ab over a squared plu