Answer:

Step-by-step explanation:
The complete question is shown in the attachment.
The length of the rectangle is x + 12. The width of the rectangle is x + 3.
Recall that area of a rectangle is 
In terms of x, the area is 
Recall the distributive property of real numbers: 
We apply this property to get:

We expand again to get:

We now simplify to obtain:

The area of the rectangle is 
-14b+28=-10b-30
-4b+28=-30
-4b=-58
b=58/4=29/2
Answer:
14
Step-by-step explanation:
- Find the square root of 196:
I hope this helps!
Answer:
C.
Step-by-step explanation: