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A warehouse contains 55 boxes. Then a truck delivers a number of boxes at 12:00 p.m. and the team begins to unload them immediately. By 3:30 p.m. the warehouse contains 90 boxes. Suppose the boxes are unloaded at a constants rate. How many boxes are in the warehouse when the truck is finally empty at 8:30 p.m.

EXPLENATION PLEASE!!!! BRAINLIEST ON THE LINE!!!!!

Respuesta :

jcherry99

Answer:

140 are in the warehouse.

Step-by-step explanation:

In 3 1/2 hours (3:30 pm) the number of boxes that had been unloaded was the total - 55

The total is 90 so at 3:30 the number unloaded was 90 - 55 = 35

At 8:30 we are finally done, so set up a proportion.

3 1/2 / 35 = 8 1/2 / x            Cross Multiply

3.5x = 8.5*35                      Combine

3.5x = 297.5                        Divide by 3.5

x = 297.5 / 3.5

x = 85

That empties the truck but it does not tell is what's in the warehouse.

There are 55 more boxes that were there to start with

85+ 55 = 140

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