Answer:
a^2.
Step-by-step explanation:
The greatest common factor is a^2. It cannot be 3ab or 3a^2b because b is not present in the last term (a^2). Similarly there is no 3 or multiple of 3 in a^2.
Answer:

Step-by-step explanation:

Answer:
B.
Step-by-step explanation:
81x - 36 (divide by 9)
9(9x - 4)
Can I get brainliest
Call the number of courses ' C '.
Whatever it is, it will cost her [ 55 + 450C ].
How many courses can she get for $1,200 ?
55 + 450C = 1200
Subtract 55 from each side:
450C = 1145
Divide each side by 450 :
C = 1145 / 450 = 2.544...
She can only register for a whole number of courses, so<u> 2 </u>is the limit.
That will cost her (55 + 2x450) = (55 + 900) = $955
and she'll have $245 left over ... not enough for another course.