The answer is c, since they both add up to 90°
<h3><u>
Answer:</u></h3>
<h3><u>
Step-by-step explanation:</u></h3>
- 1 Year = 12 months
- => 1 month = $3.50
- => 12 months = $3.50 x 12
- => 12 months = $42
<h3><u>
Conclusion:</u></h3>
Therefore, you will pay $42 after a year.
Hoped this helped.

ANSWER:
The correct answer is
-This study is blind.
-This study is an experimental study.
STEP-BY-STEP EXPLANATION:
This study includes a controlled treatment (in this manner it is an investigation) and subjects didn't have a clue about the idea of the treatment so it is visually impaired.
Answer: Undefined
Step-by-step explanation:
slope is undefined
no y intercept
This line is vertical