The factorization of x² + x + xy + y + zx + z is​

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.

What value of x is in the solution set of –5x – 15 > 10 + 20x?

To decrease an amount by 16% what single multiplier would you use