Question

perimeter and area of a rectangle critical thinking questions...
W=original width, L=original length

1) the length of a rectangle is 3 inches longer than the width. What is the best model of the area of this rug?
A) w^2+3w

2) Write an expression that will best model the perimeter of the rectangle.
A) ???

3)Suppose we have a new rectangle with a width that is 10 inches longerthan the width of the old rectangle and a length that is twice the width of the new rectangle. what is the area of the new rectangle?
A) 2w^2+40w+200

4) What is the perimeter of the new rectangle?

Answer 1

I think 2 should be P=4w +6

Answer 2

That's what I thought as well but it's asking for the answer in inches, which is confusing me a bit.

Answer 3

well that equation would give you an answer in inches

Answer 4

even without an original description of length/width?

Answer 5

well if you put in a value for w it will give you an answer in inches that follows the model of the rectangle they described.

Answer 6

also I think the last one should be P=6w+60

Answer 7

so 4) should be 6w+60, right?
The last question is write an expression for the difference between the new and old rectangle in inches squared.

Answer 8

I think that's right, and for the last part you should get 2w+54 I think

Answer 9

Awesome! Thanks.