SOLUTION: Two gravel trucks have the capacity of 13 tons and 15 tons. They made a total of 18 round trips to haul 248 tons of gravel. Graph the number of round trips each truck made?

Question 717985: Two gravel trucks have the capacity of 13 tons and 15 tons. They made a total of 18 round trips to haul 248 tons of gravel. Graph the number of round trips each truck made?

Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
Let x = number of trips for the 13 ton truck
Let y = number of trips for the 15 ton truck.

x+y=18, counting the trips.
13x+15y=248, compute for tons of gravel hauled.

Those two can certainly well be graphed. A calculated solution should be prefered for the intersecting (x,y) point. The graph suggests 11 trips.

y=-x+18, y=-(13/15)*x+248/15)
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