1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Oksi-84 [34.3K]
2 years ago
14

Dentro de 11 años, la edad de Federico será la mitad del cuadrado de la que tenía hace 13 años. Calcula la edad de Federico.

Mathematics
1 answer:
Bad White [126]2 years ago
7 0

Plantearemos una ecuación cuadratica, y resolviendola veremos que Federico tiene 21 años.

<h3>¿Como plantear la ecuación que debemos resolver?</h3>

Lo primero que debemos hacer es definir la variable que vamos a usar, en este caso usare:

F = edad de Federico.

Dentro de 11 años, la edad de Federico será:

F + 11

Hace 13 años, la edad de Federico era:

F - 13

Reemplazando eso en lo que el problema plantea, tenemos:

(F + 11) = 0.5*(F - 13)^2

Ahora podemos resolver esto para F.

F + 11  = 0.5*(F^2 - 26*F +169)

F + 11 = 0.5*F^2 - 13*F + 84.5

Movemos todo al mismo lado:

F + 11 - 0.5*F^2 + 13*F - 84.5 = 0

-0.5*F^2 + 14*F - 73.5 = 0

Ahora tenemos una ecuación cuadratica, la cual resolvemos usando la formula de Bhaskara:

F = \frac{-14 \pm \sqrt{(14)^2 - 4*(-0.5)*(-73.5)} }{2*(-0.5)}  =\frac{-14 \pm 7}{-1}

Esto nos da dos valores:

  • F = (-14 + 7)/-1 = 7
  • F = (-14 - 7)/-1 = 21

El problema con el primer valor, es que es inconsistente con el enunciado, ya que en ese caso, Federico hace 13 años tendría una edad negativa. Así que <u>descartamos la primer solución</u> y nos quedamos con la segunda.

F = 21

Federico tiene 21 años.

Sí quieres aprender más sobre ecuaciones cuadraticas, puedes leer:

brainly.com/question/17102578

You might be interested in
What is the probability that a 44% free throw shooter will miss her next free throw?
stellarik [79]
The probability is 56/100 or 56%. Because they only got 44% of their previous throws, the probability that they'll miss the next one is 56%.
3 0
3 years ago
3(x-7)+8=-20<br><br><br><br>can someone explain how to do this step by step​
Mrrafil [7]

3(x-7)+8=-20

Multiply the bracket by 3

(3)(x)(3(-7)+8= -20

3x-21+8= -20

3x-13= -20

Move -13 to the other side. Sign changes from -13 to +13.

3x-13+13= -20+13

3x= -7

Divide by 3

3x/3= -7/3

x= -7/3 or in mixed number : -2 1/3

Answer : x= -7/3 or in mixed number : -2 1/3

3 0
3 years ago
Read 2 more answers
Write the number eighteeb in another way
makvit [3.9K]

Standard form - eighteen


number form - 18


expanded form - 10 + 8

8 0
3 years ago
Read 2 more answers
What are partial products
skad [1K]
The product of one term of a multiplicand and one term of its multiplier
7 0
3 years ago
Read 2 more answers
Find FG. The diagram is not to scale.
soldier1979 [14.2K]
FG = FE
3n - 4 = n + 8
2n = 12
  n = 6

FG = 3(6) - 4
FG = 18 - 4
FG = 14

answer
14
7 0
3 years ago
Read 2 more answers
Other questions:
  • 10y - 2x=-6<br> Find the x- intercept and y- intercept
    5·2 answers
  • How do you find the circumference of a circle
    5·2 answers
  • How do you evaluate a function?
    11·1 answer
  • A ball is thrown vertically in the air with a velocity of 90ft/s. Use the projectile formula h=−16t2+v0t to determine at what ti
    15·2 answers
  • For 5th grade which equation provides the best estimate of the product of 1.7 and 3.2
    7·1 answer
  • 10) Colleen paid $19.85 per hour for tennis lessons for 3 hours of instruction. If she gave
    14·1 answer
  • Two dice are rolled. What is the probability of getting doubles?
    15·2 answers
  • Estimate the perimeter of the figure<br> The perimeter is about ____ units.
    5·1 answer
  • S+2m=20 s-5=m substitution
    5·1 answer
  • Please get it right I can’t get it wrong
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!