Question 476964: A ship travels between two ports. The cost of fuel depends on its speed as follows:
C= $100(ax+ b + 10)
-
x
where x is the average speed of the ship in knots (x > 0) and a and b are constants. If the ship travels at 4 knots the cost of fuel is $9000 but at 6 knots it is $7000.
a)From two linear equations consist of a and b.
b)Find the values of a and b.
c)If it speed is 10 knots, what is the cost of the fuel?
Answer by josmiceli(19441)   (Show Source):
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