Question

Two airplanes leave Dallas, Texas traveling in opposite directions. One is traveling 28 mph faster than the other airplane. How fast is the faster airplane traveling if the two airplanes are 2,320 miles apart after 2 hours and 30 minutes?
f - s = 28

2.5 (f + s) = 2320

f + s = 928

adding equations to eliminate s
... 2 f = 956

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