Erica knits 39 on friday just add 21 and 18 then u get 39 hope i helped
Answer:

Step-by-step explanation:
Given:


The attachment completes the question
From the attachment, the slope of the line was calculated as:

This step is inaccurate because the slope of a line is calculated using

Which gives



The line equation is then calculated using:

Substitute values for m, x1 and y1


Open bracket

Make y the subject

The first and last choices are the only ones whose angles total 180 degrees, so they're the only possible triangles.
I’m pretty sure it’s 2 but i’m not 100 percent on that
Answer:
not enough info, make another question with the problem attached
Step-by-step explanation: