42.8k views
0 votes
Can Someone help me with number 4 i dont understand

Can Someone help me with number 4 i dont understand-example-1
User Vdolez
by
8.1k points

1 Answer

4 votes

Two lines are parallel if their slopes are equal.

In this case we have the lines:


\begin{gathered} y-7x=6 \\ y+7x=8 \end{gathered}

If we rearrange them in slope-intercept form, we get:


\begin{gathered} a)y-7x=6\longrightarrow y=7x+6 \\ b)y+7x=8\longrightarrow y=-7x+8 \end{gathered}

As line a has a slope m=7 and line has a slope m=-7, the lines have different slopes so they are not parallel.


\begin{gathered} m_a=7 \\ m_b=-7 \\ 7\\eq-7\longrightarrow\text{not parallel} \end{gathered}

Answer: The lines are not parallel

User Kopecs
by
7.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories