Sarah and nancy each drive 600 miles. sarah's average speed is represented by x miles per hour. what does the denominator of the rational expression 600/x−4 mean in the context of this situation? a) the denominator represents nancy's average speed if she averages 4 mph less than sarah. b) the denominator represents the time required for nancy to drive 600 mi. c)the denominator represents nancy's average speed if she averages 4 mph more than sarah. d)the denominator represents the time required for sarah to drive 600 mi.

The denominator of the rational expression 600/(x-4) is x-4.

We know x represents Sarah’s average speed. So x-4 will also represents the average speed. And x-4 represents 4 mph less than the average speed of Sarah, x.

Therefore, option a) is correct.

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step-by-step explanation:

because they could drop even lower..