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

Which of the following measures is positively correlated with economic growth for acountry?a. Unemployment rateb. Infant mortality ratec. Inflation rated. Life

Question 1-3How are a star, the Sun, and Earth different?Earth produces light energy, but the star and Sun do not.The star and Sun produce light energy, but Ear

Next OPretest: Is It the Achievement of the4Select the correct answersWhat are two ways the initiating event affects the plot of a story?It often helps develop

The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 3338 grams and a variance of 85,849.

Which of the following is NOT a type of strategic control?Preventive ControlConcurrent ControlReactive ControlFeedback Control

What is the minimum FICO credit score to obtain a Conventional Conforming FRM loan?A) 780B) 620C) 80D) 700

b. In recent years, much of California has had drought conditions. Much of our food comes fromCalifornia, and there are many growing cities in that state. What

A car's petrol tank holds 72 litres. How many gallons is this? Use 1 gallon =4 (1/2) litres

One letter is randomly selected from the word MASS and a second letter is randomly selected from the word JOKES.What is the probability that both letters are vo

Rosiglitazone is contraindicated for people with O renal disease. O congestive heart failure. O ketosis. O diarrhea.