Answer:
D) b = 
Step-by-step explanation:
First, move all the terms that do not include b to the left side with S:
S = 2ab + 2bc + 2ac
S - 2ac = 2ab + 2bc
Now, factor out 2b from the right side:
S - 2ac = 2b(a + c)
Divide both sides by 2(a + c):
b = 
Finally, multiply out the denominator:
b = 
8.4/4.8=y/14.4
y=25.2
Here is the answer
Answer:
16
Step-by-step explanation:
n=pens
n+9=25
solve for n
n=16