if kittens need half of what an adult cat needs, and 13 pounds of cat food is wat a grown cat needs, half of 13 is 6.5. Divide it by 2.99 and you get 2.173913043. Round down and 2 is your answer.
Rewrite the given equation as . Since , you can conclude that the imimum value of y will be gained for the minimum value of . The minimum value of is 0 for x=2. So, y(2)=0+4=4. Answer: minimum value of y is 4, when x=2.
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, you can conclude that the imimum value of y will be gained for the minimum value of 
. The minimum value of