bultron1966
19.10.2021 •
Mathematics
A freight train leaves a station and travels north at 55 mph. Four hours later, a passenger train leaves on a parallel track and travels north at 66 mph. How long will it
take the passenger train to overtake the freight train? How far from the station will they meet?
How long will it take the passenger train to overtake the freight train from when the passenger train leaves the station?
hours
(Type an integer or a decimal)
Solved
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Ответ:
Step-by-step explanation:
Yes y varies directly with x.
From the equation of a straight line,
y = mx+c, calculating the gradient (m) after doing the plotting with the given coordinates, (m) =4/5.
Therefore the equation of the line is
y= 4/5x + c and c is the point at which the line intersected the y - axis which is roughly 15.
Therefore the equation of the line id
5y = 4x + 75.