First and last ones
The " = [number] " at the end of an equation for a circle is the radius squared
So if the diameter is 12, then the radius is 6, and 36 is 6 squared
Also as long as the x term doesn't have an integer affecting it (like -3 or +5) then it'll stay on the y axis.
Answer is in the photo. I can only upload it to a file hosting service. link below!
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Answer:

Step-by-step explanation:

Angles and sides
meaning the length of the sides of the triangle and all the angles <span />