Solve the System by Using Either the Substitution Method or the Elimination-By-Addition

question 172

Multiple Choice

Solve the system by using either the substitution method or the elimination-by-addition method, whichever seems more appropriate. $\left( \begin{array} { lll } y &=& 3 x \\0.31 x &+& 0.09 y &= &232\end{array} \right)$

• A) (600, 1,800)
• B) (400, 1,200)
• C) dependent
• D) inconsistent

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Definitions:

Allele Frequency

Allele frequency refers to how common an allele is in a population, expressed as a proportion or percentage of all alleles for a given gene in the population.

Stabilizing Selection

Natural selection that acts against extreme phenotypes and favors intermediate variants; associated with a population well adapted to its environment. Compare with directional selection and disruptive selection.

Natural Selection

The process by which individuals with traits better suited to their environment are more likely to survive and reproduce, driving the evolution of species.

Population

A collection of the same species individuals who live in a specified area and breed among themselves.