Answer:
1 neither
2 supplementary
3 supplementary
Step-by-step explanation:
<em><u>The common difference d is </u></em>
<em><u>The first term is</u></em>
<em>so , the first term is -13 </em>
The formula of a midpoint:

We have:

Substitute

<h3>Answer: (-2, -4)</h3>
Answer: yes
Step-by-step explanation: