Answer:
A
Step-by-step explanation:
how I solved it was 4x3=12
Fixing two of the bits leaves four remaining positions, each with two possibilities (0 or 1), so there are

possible strings.
Answer:
0.6-2.1=1.5
Step-by-step explanation:
0.6-2.1=-1.5
0.6-2.1= - I2.1-0.6I
2.1
-0.6
--------
1.5
Answer:
12
Step-by-step explanation:
X^2 = (7+9)(9) -->
X^2 = 16(9) -->
X = 12