SOLUTION: Aviation: The number of miles that remain to be flown by a commerical jet traveling from boston to Los Angeles can be approxiamated by the equation Miles remaining = 2650-475t W

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Question 3361: Aviation: The number of miles that remain to be flown by a commerical jet traveling from boston to Los Angeles can be approxiamated by the equation
Miles remaining = 2650-475t
Where t is the number of hours since leaving boston. In how many hours will the plane be 100 miles from Los Angeles: Round to nearest tenth of an hour.
Answer by drglass(89) About Me  (Show Source):
You can put this solution on YOUR website!
You want to find the time t when the plane has 100 miles remaining using the equation remaining miles = 2650+-+475t. In the equation, set remaining miles to 100, the equation becomes:

100+=+2650+-+475t

Now we have to manipulate the equation to make it give us a value for tt. In other words, isolate t in the equation.

+100+-+100+=+2650+-+475t+-+100 subtract 100 from both sides and the equation becomes +0+=+2550+-+475t
0+%2B+475t+=+2550+-+475t+%2B+475t add 475t to both sides and the equation becomes 475t+=+2550
%28475t%2F475%29+=+%282550%2F475%29 divide 475 from both sides and the equation becomes t+=+%282550%2F475%29+=+5.4 when rounded to the nearest 10th