Answer:
12
Step-by-step explanation:
They have 9 angles, the way i remember is when i see “non” that basically means 9
Answer:
B
Step-by-step explanation:
Let y = f(x) and rearrange making x the subject
y = x² + 7 ( subtract 7 from both sides )
y - 7 = x² ( take the square root of both sides )
±
= x
Change y back into terms of x, thus
(x) = ± 
It’s option 2. Which is A and B. I had this exact question on a math test