Let f(x) and g(x) be polynomial as shown below. Which of the following is true about f(x) and g(x)? A. f(x) and g(x) are closed under addition because when added, the result will not be a polynomial.

B. f(x) and g(x) are not closed under addition because when added, the result will be a polynomial.

C. f(x) and g(x) are not closed under addition because when added, the result will not be a polynomial.

D. f(x) and g(x) are closed under addition because when added, the result will be a polynomial.

This question is from PLATO/Edmentum.

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

I’m stuck on this equation, anyone got the answer?

Evaluate the function , when d = {9, 15, 30}. r = {5, 7, 12} r = {6, 10, 15} r = {6, 10, 20} r = {5, 12, 20}