The answer is c because all you are doing here is subbing the variable r for 5b.
D is the correct answer to the equation.
Well hey...
2.25 ÷ 2.17 = 1.03 people on square miles
Do you mean an extraneous solution? I will tell you what I think. To tell if a solution is extraneous you need to go back to the original problem and check if there actually is a solution or if the solution is actually right. If not then it is extraneous.
Step-by-step explanation:
4x
__________
| |
x-3| | x-3
| |
|__________
4x
Add all sides together to get perimeter
2(4x)+2(x-3)=10x-6
