Answer:
2x+4y,9
Step-by-step explanation:
Answer:
C 9i
D -9i
Step-by-step explanation:
sqrt(-81)
sqrt(81) sqrt(-1)
we know that sqrt(-1) = i
±9i
Answer:
8,9
Step-by-step explanation:
(x +1) + 7=2x
x+8 = 2x
8=x
Answer:
4y
Step-by-step explanation:
To find the greatest common factor of 2 numbers, factor both of the numbers:
4: 1, 2, 4
12: 1, 2, 3, 4, 6, 12
The greatest factor here in both of these lists is 4. These numbers also both have a factor of y, so you multiply those together and get 4y.

Answer:
4 5/12
Step-by-step explanation:
We need a common denominator of 12
4 3/4 = 4 3/4 *3/3 = 4 9/12
1/3 *4/4 =4/12
4 9/12 - 4/12 =4 5/12