SOLUTION: For my assignment: Suppose that the length of a rectangle is three cm longer than twice the width and that the perimeter of the rectangle is 90.
1. set up an equation for the peri
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1. set up an equation for the peri
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Question 489833: For my assignment: Suppose that the length of a rectangle is three cm longer than twice the width and that the perimeter of the rectangle is 90.
1. set up an equation for the perimeter involving only W, the width of the rectangle.
You can put this solution on YOUR website! For my assignment: Suppose that the length of a rectangle is three cm longer than twice the width and that the perimeter of the rectangle is 90.
1. set up an equation for the perimeter involving only W, the width of the rectangle.
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Let l = the length, w = the width
Given:
length is 3 cm MORE than TWICE the width
l = 3 + 2w
perimeter is 90.
2l + 2w = 90
Substitute the value for l from the 1st equation into the 2nd:
2(3+2w) + 2w = 90
Simplify:
6 + 4w + 2w = 90
6w = 84
w = 14
