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?

Algebra ->  Linear-equations -> 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?       Log On


   

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) About Me  (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.

graph%28450%2C450%2C-1%2C18%2C-1%2C18%2C-x%2B18%2C-%2813%2F15%29%2Ax%2B248%2F15%29
y=-x+18, y=-(13/15)*x+248/15)