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3 years ago

Does anyone know what the answer please??

Mathematics

1 answer:

olchik [2.2K]3 years ago

5 0

Answer:

x=4

Step-by-step explanation:

im pretty sure you make the equation equal to eachother so its 9x+4=5x+20

combine like terms

4x=16

x=1/4

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Answer:

Assuming the length to be x and the width to be y.

Since the area is 64cm, hence

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Since the perimeter is 40cm, hence

x + x + y + y = 40

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2(x + y) = 2(20)

x + y = 20 (equation 2)

Hence by using simultaneous equation,

x = 20 - y (equation 3)

Substituting equation 3 into equation 1, we get

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Tidying up the equation,

y^2 - 20y + 64 = 0

By using factorisation,

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By substituting y=16 into equation 1,

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By substituting y = 4 into equation 1,

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The length is 4 cm while the width is 16 cm.

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Answer:

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Step-by-step explanation:

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