B , because u have to add alla sides to find the missing number
Answer:
1
Step-by-step explanation:
The standard form equation for a circle is

where (h, k) is the center and r is the radius.
The standard form equation for an ellipse is

(center h, k and major and minor axes a and b)
This equation is standard form for neither, but might be general form for one.
It should be 10...because the 2 angles in the base are the same so the length is mirrored
Answer:

Step-by-step explanation:
Remember that in order to find the slope of two points you need to substitute the variables and subtract making sure you keep the 2's and the 1's together.

Plugin your numbers:




Hope this helps.