SOLUTION: a woman drives for a total of 10 hours. She drives for t hours at a rate of 45 mph and the remaining time at a rate of 55 mph. Express the total distance covered, d, as a function

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Question 992181: a woman drives for a total of 10 hours. She drives for t hours at a rate of 45 mph and the remaining time at a rate of 55 mph. Express the total distance covered, d, as a function of t. (d=rt)
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
She travels at 45 for t hours. That means she travels (10-t) hours at 55.
so
Distance+=+DistanceAt45+%2B+DistanceAt55
Distance+=+45%2At++%2B+55%2A%2810-t%29
Distance+=+45t+%2B+550+-+55t
Distance+=+550+-+10t