Here's my interpretation: 4 whole km, plus zero tenths of a km, plus 3 hundredths of a km, plus 5 thousandths of a km.
I believe that the answer is 20. I am not entirely sure though.
The equation that represents x when solved is 
Given the equation that expresses the weight of a chimpanzee with respect to the months of birth as:
y = 1.5x + 8
We are to express x in terms of "y"

Subtract 8 from both sides

Divide both sides by 1.5

Hence the equation that represents x when solved is 
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Answer:
40 % of the snacks were carrot sticks.
Step-by-step explanation:
Total number of carrot sticks in lunch = 18
Total number of apple slices in lunch = 27
So, Total Snacks in the Lunch = Carrot Sticks + Apple Slices
= 18 + 27 = 45
Now,
= 
⇒Percentage of Carrot Sticks = 40%
Hence, 40 % of the snacks were carrot sticks.