Solve the System of Equations $$\begin{aligned}x - y + 5 z & = - 3 \\1 x + z & = 0 \\x + 3 y + z & = 9\end{aligned}$$

question 147

Multiple Choice

Solve the system of equations.
- $$\begin{aligned}x - y + 5 z & = - 3 \\1 x + z & = 0 \\x + 3 y + z & = 9\end{aligned}$$

• A) \(\{ ( 0,3,0 ) \}\)
• B) \(\{ ( 0,0,3 ) \}\)
• C) \(\{ ( 0,3 , - 3 ) \}\)
• D) \(\{ ( 3,0,0 ) \}\)

---

Definitions:

Incidence

The rate at which new cases of a disease or condition appear over a certain period of time, typically per year.

Placebo Control Group

In a therapy outcome study, group of people whose treatment is an inactive substance (to compare with the effects of a drug) or a nontheory-based therapy providing social support (to compare with the effects of psychotherapy).

Ethical Problem

A situation that requires a person to choose between alternatives that must be evaluated as right (ethical) or wrong (unethical).

Withholding Treatment

The ethical and medical decision not to administer a specific medical treatment to a patient, often under circumstances where the treatment will not improve quality of life or extend it in a meaningful way.