The way that the number of trucks and cars respectively are known is to utilize the given ratio multiplied by the total number of vehicles.
We are told that the ratio of trucks to cars is; 4:5
Now, if the total number of trucks and cars is denoted by x, then it means that; ⁴/₉x will give us the number of trucks while ⁵/₉x will give us the number of cars.
Total number of trucks and cars = 64 + 80
Total number of trucks and cars = 144
Thus;
Number of trucks = ⁴/₉ * 144 = 64 trucks
Number of cars = ⁵/₉ * 144 = 80 cars
Read more about Ratio Problems at; https://brainly.com/question/12175681
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