Samsonisnothereidn
Answered

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Dump Truck #1 is traveling east at 50 mph and is 20 miles ahead of Dump Truck #2, which is following behind it at a speed of 70 mph. How many hours will it be before they are side-by- side?​

Sagot :

Jcherry99idn

Answer:

Step-by-step explanation:

Formulas

d1 = 20 + 50*t                       This is dump truck #1

d2 = 70*t                               This is dump truck #2

d1 = d2                                  This is given in the problem

Solution

if d1 = d2 then you get 20+50t = 70t as your working equation.

20 + 50t = 70t                        Subtract 50t from both sides

20 +50t-50t = 70t-50t           Combine

20 = 20t                                  Divide both sides by 20

20/20 = 20t/20                      

1 = t

Answer

after 1 hour Dump Truck 2 will catch dump truck 1

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