Aresearcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. she feeds one group of laboratory rats a daily diet of precisely 33.65 units of niacin and 38,700 units of retinol. she uses two types of commercial pellet foods. food a contains 0.11 unit of niacin and 195 units of retinol per gram. food b contains 0.38 unit of niacin and 75 units of retinol per gram. how many grams of each food does she feed this group of rats each day?

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step-by-step explanation:

your answer is b.

x = 33.9

y = 65.6

step-by-step explanation:

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function