Answer:
-12z^2
<em>Brainliest, please!</em>
Step-by-step explanation:
-5z^2 - 7z^2 = -12z^2
Answer:
y = 3
Step-by-step explanation:

Answer:
C 377
Step-by-step explanation:
I simply typed in "surface area of cone calculator" in chrome and did it that way, since there is quite a complex formula for finding it out on your own.
(This is the formula : pi * r^2 + pi * r * sqrt (r^2+h^2)
Infinite number of lines.