Shana wants to use all 62 feet of the fencing she has to make a rectangular run for her dog. She decides to make the length of the run 20 feet. She writes and solves the equation 2l + 2w = 62 to find the width of the run. Which statements are true of the solution? Check all that apply. The value of w is 10 feet. The value of w can be zero. The value of w cannot be a negative number. Substitution is used to replace the variable l with a value of 20. The subtraction property of equality is used to isolate the term with the variable w.
famousshorty:
what is the correct answer?
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Answered by
30
Sketch a rectangle on a piece of paper. Label one side l and the corner side w. All the equation is saying that the perimeter is the sum of the lengths of the 4 sides. Two of the sides are length l and the other two are w so you get 2l + 2w = 62.. She makes the length 20' so that becomes the value for l. w must then be 11', just use the equation with l set to 20'
1. Not true, we just determined it's 11'
2. Not true, see above
3. w is a positive number so I would say 3 is true, little confusing.
4. is true, substitution for l = 20 is how we found w.
5. is true. You substitute l = 20 into the equation and then add -40 to each side to get the equation in the form of 2w = 22 and then you divide both sides by 2.
Hope this helps
:)
1. Not true, we just determined it's 11'
2. Not true, see above
3. w is a positive number so I would say 3 is true, little confusing.
4. is true, substitution for l = 20 is how we found w.
5. is true. You substitute l = 20 into the equation and then add -40 to each side to get the equation in the form of 2w = 22 and then you divide both sides by 2.
Hope this helps
:)
Answered by
37
Answer is 3,4,5. I'm 100% sure, just took the Assignment.
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