Las edades de Andrea y Alejandro son 40 y 16 años, respectivamente.
En esta pregunta debemos traducir el enunciado en ecuaciones algebraicas y resolver el sistema resultante. Tras una lectura cuidadosa tenemos el siguiente sistema de ecuaciones:
(1)
(2)
Donde:
- Edad de Andrea, en años.
- Edad de Alejandro, en años.
A continuación, procedemos a resolver el sistema:
(1) en (2):
Por (1):
Las edades de Andrea y Alejandro son 40 y 16 años, respectivamente.
Para aprender más sobre álgebra, invitamos cordialmente a ver esta pregunta verificada: brainly.com/question/8122776
Answer:
It is given that a bag contains 3 red marbles, 5 blue marbles and 2 green marbles.
The total number of marbles in the bag is 10.
Two blue marbles are drawn one after another from the bag.
Let A be the event that getting two marbles are blue marbles under condition is with replacement.
The probability of...
If I’m correct, I think it’s 2
The absolute value equation is 
, if the solutions are x=2.5 and x=-3.5.
Step-by-step explanation:
The given is,
Two solutions: x = 2.5 and x = -3.5
Step:1
In this question we use reverse method of quadratic equation solve method,
From first solution, x = 2.5
x - 2.5 = 0..........................(1)
From the second solution, x = -3.5
x + 3.5 = 0.................(2)
From the equations (1) and (2),
( x - 2,5 ) ( x + 3.5 ) = 0
Multiply the equations,
Step:2
Check for solution,
..........................(3)
Substitute the value of x=2.5 in above equation,
6.25 + 2.5 - 8.75 = 0
0 = 0
Result:
The absolute value equation is , if the solutions are x=2.5 and x=-3.5.
