Answer:
b. 6 cm
Step-by-step explanation:
Q is the midpoint of PR, so QR = PR/2 = (12 cm)/2 = 6 cm
Answer:

Steps :
1. Create an equation
If x-4=0 and y-10.4=0, then x - 4 = y - 10.4

2. Isolate variable X by adding 4 to both sides

3. (Optional) Check Answer by plugging given values into the equation

4 = 4 is a true statement
The "inverse" operation of the distributibe property is factoring common terms: since the litera part is different for each term (we have a term involving x alone, a term involving y alone, and a pure number), we can only factor the numerical part.
4, 12 and 32 have factor 2 or 4 in common, so the two possible algebraic expression could be


8 because 27/7 is 4 and 4x2 is 8