The first answer is correct .
Answer:
2(a - 2b)
Step-by-step explanation:
2 is a common factor of 2a - 4b. The a's and b's cannot be part of the common factor.
2(a - 2b) is the answer.
Notice that both sides of the minus sign are effected by the two being taken out.
hmmm let's find the distance between B and C first off.
hmmm if BC is that much, then AB + AC = 7, since AB + AC + BC = 12 which is the perimeter, Check the picture below.
To find the simplest form of the ration divide the numerator and denominator by the GCF of both numbers. In this case the GCF is 10. (GCF means the Greatest Common Factor).
10÷10/50÷10 = 1/5
Best of Luck!