​Solve the System of Linear Equations by the Method of Elimination,find

question 39

Multiple Choice

​Solve the system of linear equations by the method of elimination,find (x,y) . ​​ $$\left\{ \begin{array} { c } \frac { 9 } { 4 } x + \frac { 1 } { 4 } y = \frac { - 7 } { 4 } \\9 x + y = - 7\end{array} \right.$$ ​

• A)​(4,-43)
• B)(a,-7 - 9a)​(infinitely many solutions)
• C)​(2,-25)
• D)​No solutions
• E)​(8,-79)

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Definitions:

Null Hypotheses

A statistical hypothesis that assumes no significant difference or effect exists within a set of observations.

Alternative Hypotheses

In hypothesis testing, statements that are accepted if the evidence provides sufficient support for them being true, as opposed to the null hypothesis.

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Housing units that are affordable for individuals or families with low yearly income, often supported by government programs.

Commute

The process of traveling between one's place of residence and place of work or study.