SOLUTION: I saw this problem in my math book:
The perimeter of the parallelogram below is 42 meters. Write a linear equation in two variables for the perimeter. Use this equation to find
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The perimeter of the parallelogram below is 42 meters. Write a linear equation in two variables for the perimeter. Use this equation to find
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Question 307528: I saw this problem in my math book:
The perimeter of the parallelogram below is 42 meters. Write a linear equation in two variables for the perimeter. Use this equation to find x when y is 8.
2y
x x
2y
My answer is: 2x+4y=42 and I get the right answer. I know the perimeter of a parallelogram is P=2a+2b.
The book's answer is: x+y=21 and get the same answer I do (x = 5 meters)
My question is why does the book use the equation, x+y=21, for the answer???? Answer by Earlsdon(6294) (Show Source):
You can put this solution on YOUR website! Assuming that x and y are the lengths of the sides of the parallelogram, then the perimeter is given by: Substituting we have... Factoring a 2 from the right side then dividing both sides by 2, we get... or
Now if y = 8, then... Subtracting 8 from both sides, we get...
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