Find f[g(x)] and g[f(x)].f(x) = 5x2; g(x) = x + 3

A. f[g(x)] = 5x2 + 30x + 45
g[f(x)] = 5x2 + 3
B. f[g(x)] = 5x2 + 45
g[f(x)] = 5x2 + 30x + 3
C. f[g(x)] = 5x2 + 3
g[f(x)] = 5x2 + 30x + 49
D. f[g(x)] = 5x2 + 30x + 3
g[f(x)] = 5x2 + 45


Answer: A

Mathematics

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A. When g = 15, P = 150.07; 15 mice gained an average of 150.07 ounces per day when fed the special food.
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C. When g = 15, P = 19.45; The average amount of the special food that 15 mice should be fed is 
D. When g = 15, P = 149.65; When a mouse is fed 15 grams of the special food per day, its average weight is 149.65 ounces.

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