Each edge is given by the distance formula, which is the Pythagorean Theorem. When one of the coordinates is the same, we can shortcut that.
A(−2, 1) , B(−2, 7), C(1, 11), D(4, 7), E(4, 1)






Answer: 28
C to your question for this
Answer:
-7
Step-by-step explanation:
y−x=9 ⇒ y=x+9
10+2x=−2y
5+x= -y ====== replacing y with x+9
5+x= -x-9
2x= -14
x= -7
Substitution is plugging in a value for a variable to help solve the problem or equation.
<span>for example </span><span>"Substitute 5 into x" means plug 5 into x </span>