Okay so in order to find the circumference we would first need to find either the diameter or radius of the circle. The perimeter of the square is 40 and each side is equal. 40/4 = 10. So the length of one side is 10. The length of one side would be the diameter of the circle.
Diameter = 10
The only thing that is left is to find the circumference.
The formulas for circumference are:
C =

d
C = 2

r
So just multiply the diameter by pi (3.14)
10 x 3.14 = 31.4
or 10

(Which would be the answer to your problem)
Answer:
Step-by-step explanation:
4a + 8 > 11a + 15
Subtracting 4a both sides
8 > 11a - 4a + 15
Subtracting 15 both sides
8-15 > 7a
-7 > 7a
Dividing both sides by 7
-7/7 > a
-1 > a
13 - 14a < 13 - 3a
Subtracting both sides by 13
13-13 -14a < -3a
Adding 14a both sides
0 > -3a + 14a
0 > 11a
Dividing 11 both sides
0 > a
Hope this helps!

Solution:
Given equation is
.
To solve the equation by step by step.
Step 1: Given

Step 2: Combine like terms together.
Plus symbol changed to minus when the term goes from right to left (or) left to right of the equal sign.

Step 3: Subtract the fractions in the left side.

⇒ 
Step 4: Divide both side of the equation by 3, we get


Hence, the answer is
.