s7immermur9angelle s7immermur9angelle
  • 21-03-2017
  • Mathematics
contestada

A parking lot has a total of 60 cars and trucks. the ratio of cars to trucks is 7:3. how many cars are in the parking lot? how many trucks are in the parking lot? justify your answers.

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wolf1728
wolf1728 wolf1728
  • 24-03-2017
A) c + t = 60
B) 3c = 7t
Multiplying A) by -3
A) -3c + -3t = -180 then adding this to b
B) 3c = 7t
180 = 10t
trucks = 18
cars = 42


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