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BlackZzzverrR [31]
4 years ago
14

The area of a bulletin board is 55 ft2. The length is nine feet less than four times the width. Find the length and the width, i

n feet, of the bulletin board.
Mathematics
1 answer:
galben [10]4 years ago
7 0

Answer:

The length and width are 11ft and 5ft respectively

Step-by-step explanation:

let the

length = L

Width = W

Area = LW = 55

The length is nine feet less than four times the width

L = 4W - 9

W (4W - 9) = 55

4W^2 - 9W -55 = 0

4W^2 - 20W + 11W - 55 = 0

4W(W - 5) + 11(W - 5) = 0

(W - 5)(4W + 11) = 0

W - 5 = 0 , 4W + 11=0

W = 5 or  - 11/4

since the width cannot be negative, W = 5

LW = 55

L = 55/5

L = 11

The length and width are 11ft and 5ft respectively.

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Answer:

x-intercept = 17/4 and y = -17/3

Step-by-step explanation:

To find the intercepts: set x = 0 for the y-intercept and solve the equation and set y =0 for the x- intercept and solve the equation.

To

4x - 3y = 17

4(0) - 3y = 17

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The ordered pair on the graph is (0, -17/3)

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A bacteria culture initially contains 2000 bacteria and doubles every half hour.
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<em>Answer:</em>

<em>Can be found below</em>

<em>Step-by-step explanation:</em>

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