The width of a rectangle is 2 feet longer than four times its length, and its area is 42.The length of the rectangle is feet and the width is feet.Check AnswerQuestion 6
Question
The width of a rectangle is 2 feet longer than four times its length, and its area is 42.The length of the rectangle is feet and the width is feet.Check AnswerQuestion 6
Solution
Let's denote the length of the rectangle as L and the width as W.
From the problem, we know that:
-
W = 4L + 2 (since the width is 2 feet longer than four times its length)
-
The area of a rectangle is given by the formula A = L * W. We know that A = 42, so we can write this as 42 = L * W.
We can substitute the first equation into the second to solve for L:
42 = L * (4L + 2)
This simplifies to:
42 = 4L^2 + 2L
Rearranging terms gives us a quadratic equation:
4L^2 + 2L - 42 = 0
We can divide through by 2 to simplify:
2L^2 + L - 21 = 0
This factors to:
(2L - 7)(L + 3) = 0
Setting each factor equal to zero gives the solutions L = 7/2 = 3.5 and L = -3. Since length cannot be negative, we discard the second solution.
Substituting L = 3.5 into the first equation gives W = 4*3.5 + 2 = 16.
So, the length of the rectangle is 3.5 feet and the width is 16 feet.
Similar Questions
A rectangle with an area of 294 square feet has a length and width in a ratio of 3:2. What are the length and width?length = feetwidth = feet
A rectangle's length and width are in a ratio of 5:1. The perimeter is 24 feet. What are the length and width?length = feetwidth = feetSubmit
The perimeter of a rectangle is 4646 feet. If the length is 1212 feet, find the width.Step 3 of 3: Finally, solve the problem by substituting in the appropriate values. (Round your answer to 2 decimal places if necessary.)
The perimeter of a rectangle is 5555 feet. If the length is 1414 feet, find the width.Step 3 of 3: Finally, solve the problem by substituting in the appropriate values. (Round your answer to 2 decimal places if necessary.)
For a given set of rectangles, the length is inversely proportional to the width. In one of these rectangles, the length is 5 and the width is 21. For this set of rectangles, calculate the width of a rectangle whose length is 35.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.