Answer:
Its (A), 1/9a^2
if you work out all of the other options it does not equal to the expression (3a)^-2
Step-by-step explanation:
[ (12 - n)/7 ] = -1
12- n = -7
-n = -19
n = 19
Answer:
NO 21
Step-by-step explanation:
9x2=18
18+3=21
Answer:
-1/3
Step-by-step explanation:
1/3 is 0.33333... and then you just put a negative sign in front of it.
Answer:
1325/10000
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