JB's music store is offering a 20% discount on all CD's and DVD's, meaning 80% of the price still remains. If the discounted pri
1 answer:
You might be interested in
Answer:
16cm
Step-by-step explanation:
Given
--- rectangles
Required
The perimeter of square in the middle
The area of a rectangle is:
So, we have:
The perimeter is:
So, we have:
Divide by 2
Make L the subject
Substitute in
Open bracket
Rewrite as:
Expand
Factorize
Factor out W - 3
Solve for 7
We have:
This means that:
The length (l) of the square is:
---- the difference between the dimension of the rectangle
The perimeter is:
