<span>6 (a + b) = 6a + 6b
answer is </span><span>B) 6a + 6b </span>
First, 10 1/2 is the same as 21/2
If there are 12 inches in a foot then
21/2*12=126 inches
Answer:

Step-by-step explanation:
Rule: 

Answer:
x²-9=x²-3²=(x+3)(x-3)
Step-by-step explanation:
use formula
a²-b²=(a+b)(a-b)
Answer:
y=2
Step-by-step explanation:
x+y=8
6+y=8
6+2=8
so y=2