avatran1011 avatran1011
  • 25-08-2017
  • Mathematics
contestada

If the average (arithmetic mean) of 2, 7, and x is 12, what is the value of x?

Respuesta :

Аноним Аноним
  • 31-08-2017
The three numbers are 2, 7 and x.

Ther sum is
 2 + 7 + x = 9 + x

 Because the arithmetic mean is 12, therefore
(9 + x)/3 = 12
9 + x = 12*3 = 36
x = 36 - 9 = 27

Answer:  x = 27
Answer Link

Otras preguntas

Why did developing nations often align themselves with one or the other superpower?
What is the solution set of 2x-5=7-4x
Simplify 8y(y - 4) + 3y(y + 2). the choices are below 24y 2 - 26y 11y 2 - 26y - 8 11y 2 - 26y 11y 2 - 8
how many times does 4 go into 144
Why was the Weimar Republic considered weak?
What must a candidate win a majority of to become the US president?
A patient is in need of hydration. Which type of solution are the patient’s cells most likely in
which is shorter 38.4 or 38.19
1.WHAT IS 18 MULTIPLIED BY[-7/6] 2.WHAT IS 8 MULTIPLIED BY [-4/5] AND MULTIPLIED BY -10 3. WHAT IS [-2/3x] MULTIPLIED BY 15
Why might nations want to retain or develop an arsenal of nuclear, biological, and chemical weapons?