Posted on 03/10/2015 5:48:37 PM PDT by MNDude
My daughter has this problem-solving question for her homework. I'm feeling kind of dumb on this one. What do you think is the correct answer?
Mrs. Feltner wants to put a border on a baby blanket. The area of the blanket is 12 square units. Which shows how many units of materials she needs for the border?
A 12 units B 14 units C 15 units D 21 units
Since 10 is not offered as a possible answer, the only correct one is 12, B.
Yikes. 12 ... A.
No, it doesn’t, because it’s only one answer out of an infinite number of possibilities.
Baby blanket is the object ... so it’s likely to be 4x3 ... if it is 6x2, demand to see a photograph of that baby : ))
Given all factors of 12, the only one of the choices you are given that can work is B. None of the other choices are possible. Nothing wrong with this question. Since 26 (12x1), and 16 (6x2) are not options, the dimensions must be 4x3. Hence 14.
Your analysis is correct. Assuming the blanket is at least rectangular. But only one of the answers match the possibilities, therefore it's save to assume the answer is 14 and that the blanket must be 3x4.
Sometimes the answers on a multiple choice question provide information you can use.
I had a math teacher who would ask questions that did not have a clear answer like this one. The expect answer was to come back with questions like this thread. Always homework questions. He laerned us are math reel good
Your answer has to be limited to the choices given.
B 14 units
no, that’s 15.674.
I guess there are four corners since it said “square” quilt.
Not enough info to assume triangular, circular or oblong in which the area would also be expressed in SqFt.
I wonder if all these math people play the drums? Raise your hands.
Your wife is correct, it’s 18.
Draw a 3” x 4” square
The create 12 1x1 inch squares.
Count the number of squares that make up the border
You get 10 1x1 inch squares or 10 square inches.
a. 12x1= 26 units
b. 6x2=16 units
c. 4x3=14 units.
Therefore the only answer among the possibilities is 14.
I remember doing this graphs Jr year in pre-cal.
My head hurts.
Dang! This is for second grade!
You are absolutely correct! (because I have to teach Common Core, my first thought on this problem was: make a new ten!)
LW = 12
2L + 2W = P
This is a system of 2 equations in 3 unknowns. It therefore has an infinite number of solutions. The minimum solution is for a square:
L2 = 12
4L = P
This is solvable, the answer is L = 2√3. which gives a perimeter of 4L = 8√3
The maximum perimeter is infinity. By lengthening the length and shortening the width, you can obtain any perimeter between 8√3 (≈ 13.86) and ∞.
Adult version:
How can we best “promote the general Welfare”
A. Grow government
B. Increase the minimum wage
C. Tax the “rich”
D. All of the above
Answers
E. Shrink government
F. Cut welfare
G. Empower the States
are not only wrong but will incur penalty points and a visit from Social Services to check up on the student's distorted home environment.
Doesn’t specify that the sides have to be integers.
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