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.

Respuesta :

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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