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Select the correct answer.

A jet flew from New York to Los Angeles, a distance of 4,200 kilometers. Then it completed the return trip. The speed for the return trip was 100 kilometers/hour faster than the outbound speed. This expression, where x is the speed for the outbound trip, represents the situation.
4,200/x + 4200/x+100
Which expression could be a step in rewriting this sum?

Respuesta :

Answer:

Step-by-step explanation:

4200/x  + 4200/(x+100)   = roundtrip time    

                 Next step would be to multiply through by 'x' and '(x+100)'

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