Solve.A plane flying with a tailwind flew at a speed of 400 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 340 mph. Express these relationships as equations. Let x be the speed of the plane and let y be the speed of the wind.
A. x + y = 340
y = 400
B. x + y = 400
x - y = 340
C. x + y = 340
x - y = 400
D. x + y = 400
y = 340
Answer: B
Mathematics
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A. - 
B. - 
C. - 
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A. {
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B. 
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}
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