Answer:

Step-by-step explanation:

Z-12=6
you take the 12 and add it to both sides making it look like:
z-12+12=6+12
which also looks like
z-0=6+12
z-0 = z
so now you have
z=6+12
6+12 = 18
SO Z=18!!!
your answer is 18
Answer:
4
Step-by-step explanation:
pi*r^2
just put each number where r is to find out the answer
Answer:
2x
Step-by-step explanation:
parallel lines are two lines that won't meet. the lines need to have the same slopes or else the will meet