Answer: 
Step-by-step explanation:
The missing figure is attached.
The perimeter of a rectangle is:

Where "l" is the lenght and "w" is the width.
You can identify in the figure that:

Then, knowing the perimeter of the rectangle, you can make the subsitution into the formula:

Now you must simplify and solve for "z"

Finally, substituting the value of "z" into
, you get:

Answer:
I think its distributive
Step-by-step explanation:
I'm not sure correct me if I'm wrong
The answer is b. In b, 10 is divided from both 90 and 60, and that's gives you 9+6.
Answer:
Option C. 
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is equal to the scale factor and the ratio of its perimeter is equal to the scale factor too
step 1
Find the width of the rectangle that has a length of 4 feet and a perimeter of 14 feet
The perimeter of a rectangle is equal to

substitute the values and solve for W


step 2
Find the scale factor
Let
z-----> the scale factor
To find the scale factor divide the width of the larger rectangle by the width of the smaller rectangle
so

step 3
Find the perimeter of the larger rectangle
To find the perimeter of the larger rectangle multiply the perimeter of the smaller rectangle by the scale factor
so
