determine the degree, leading coefficient and end behavior(no graphing) for each polynomial f(x)= -x^9

Aresearch company wants to test the claim that a new multivitamin to improve short term memory. state the objective of the experiment, suggest a population, determine the experimental and control groups, and describe a sample procedure.

The graph shown below expresses a radical function that can be written in the form f(x)=a(x+k)1/n+c what does the graph tell you about the value of n in this function

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?