Replace each letter with it's value, so:
= (5*-2) + (-3*2) + 3
= -10 -6 +3
= -13
The irrational in between should be 7.8
B because they are equal parts
1 meter = 100 centimeters
2.5 meters = 250 cm
If you use 50 cm, then you have
2 meters or 200 cm left
The length and width can 6 and 2 or 3 and 4.
example: 3x4=12
6x2=12