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Feliz [49]
1 year ago
12

Una persona asegura que su casa tiene forma rectangular y que el perímetro de la misma es de 18 m y que además, su área es de 21

m^2. Demuestra que la persona estaba mintiendo.
Mathematics
1 answer:
leva [86]1 year ago
4 0

Considerando las fórmulas para el perímetro y el área de un rectángulo, hay que se chega en una <u>eccuación cuadrática sin solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

<h3>¿Cuál es la fórmula para el perímetro y el área de un rectángulo?</h3>

Considerando que las dimensiones son l y w, hay que:

  • El perímetro es: P = 2(l + w).
  • El área es: A = lw.

El <u>perímetro es de 18 m</u>, o sea:

2(l + w) = 18

l + w = 9

l = 9- w.

El <u>área es de 21 m²</u>, o sea:

lw = 21

(9- w)w = 21

-w² + 9 - 21 = 0

w² - 9w + 21 = 0

El discriminante es dado por:

D = 9² - 4 x 1 x 21 = -3.

El discriminante negativo implica que la <u>eccuación cuadrática no tiene solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

Puede-se aprender más a cerca de el perímetro y el área de un rectángulo en brainly.com/question/26475963

#SPJ1

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Ghella [55]

Answer:

You take 6% of a number and the resulting number is 27.

To do this you need to change the percent into a fraction.

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This is the number you need to multiply to the number you need to find, A.

6/100 A = 27

Solve for x

6 A = 27x100

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Check your answer:

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6/100 (450) = 27

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Step-by-step explanation:

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3 years ago
The volume of a sphere is increasing at a constant rate of 141 cubic feet per minute. At the instant when the radius of the sphe
ch4aika [34]

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3 years ago
SOMEONE HELP ME
r-ruslan [8.4K]
I’m pretty sure it’s the second option.
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3 years ago
The value of a collectable car has been increasing by 4 percent each year. This year the car is valued at $15,200. Write a funct
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Answer:

I think it would be

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2 years ago
Please help!! Thank you so much! (I hate school) :,)
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