If x = 2, what is the value of 5x + 3?
A. 7
B. 10
C. 13
D. 55

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.

Sum of the interior angles of a pentagon

Y+ 2/y is it a polynomial in one variable or not? and if so, why?