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Eddi Din [679]
3 years ago
13

What is a rational number

Mathematics
2 answers:
irinina [24]3 years ago
5 0
A number that can be turned into a ratio form.
spayn [35]3 years ago
3 0
A rational number is a number that can be written as a ratio
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Si a los lados de un cuadrado se le aumenta en 3 y 5 m respectivamente la superficie del nuevo rectangulo es 440m .Encontrar el
Ivahew [28]

Answer:

El lado del cuadrado inicial es 17 m.

Step-by-step explanation:

El área de un rectángulo se calcula a partir de los dos lados diferentes. Siendo a y b el valor de ambos lados, el área de la figura es el producto de los dos lados contiguos del rectángulo.

A los lados de un cuadrado se le aumenta en 3 y 5 m respectivamente la superficie del nuevo rectángulo es 440 m². Siendo x el lado del cuadrado inicial, entonces el área del rectángulo se puede expresar como:

(x+3)*(x+5)= 440 m²

Resolviendo:

x*x + 5*x + 3*X + 3*5= 440

x² + 8*x + 15=440

x² + 8*x + 15 -440= 0

x² + 8*x -425= 0

Una función cuadrática de la forma a*x² + b*x + c= 0 se puede resolver mediante la expresión:

\frac{-b+-\sqrt{b^{2}-4*a*c } }{2*a}

En este caso, a=1, b=8 y c=425. Reemplazando:

\frac{-8+-\sqrt{8^{2}-4*1*(-425) } }{2*1}

Resolviendo:

\frac{-8+\sqrt{8^{2}-4*1*(-425) } }{2*1}= \frac{-8+\sqrt{64+1700} }{2*1}= \frac{-8+\sqrt{1764 } }{2}= \frac{-8+42 }{2}= \frac{34}{2} = 17

y

\frac{-8-\sqrt{8^{2}-4*1*(-425) } }{2*1}= \frac{-8-\sqrt{64+1700} }{2*1}= \frac{-8-\sqrt{1764 } }{2}= \frac{-8-42 }{2}= \frac{-50}{2} = -25

Como las longitudes no pueden ser negativas, <u><em>el lado del cuadrado inicial es 17 m.</em></u>

3 0
3 years ago
Dividing my dog's age by 4 and adding 6 is the same as dividing my dog's age by 8 and adding 8.
NemiM [27]

Answer:

22

Step-by-step explanation:

i just added 8+6+8  ?

idk if its right

3 0
3 years ago
If x +y equals -1 what is y?
Flauer [41]
If x+y=-1, y=-x-1

You cannot solve for y in this instance.
6 0
3 years ago
Fine the area of a circle that has a diameter of 12 inches A=3.14r2
Alexus [3.1K]

The area of circle is 113.04 in^2

Further explanation:

The area of circle is calculated by using pi and radius.

We are given

Diameter = d = 12 inches

pi = π = 3.14

r = \frac{d}{2} = \frac{12}{2} = 6\ inches

Area = \pi r^2\\= 3.14 * (6)^2\\= 3.14 * 36\\=113.04\ in^2

The area of circle is 113.04 in^2

Keywords: Circle, Area of Circle

Learn more about area of circle at:

  • brainly.com/question/1506379
  • brainly.com/question/1952668

#LearnwithBrainly

6 0
2 years ago
PLS HELP DUE IN 1 HOUR WILL GIVE BRAINLIEST 5 STARS AND A THANKSSSS !
JulsSmile [24]

Answer:

15

Step-by-step explanation:

33=9.8x-7.6x

33=2.2x

33/2.2=x

15=x

4 0
2 years ago
Read 2 more answers
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