TesterPay23 TesterPay23

17-08-2017
Mathematics

contestada

Two numbers, 3 and a, have a geometric mean of 9. Find the value of a.

Respuesta :

freedFromDesire freedFromDesire

17-08-2017

The geometric mean of two numbers x and y is √(xy).

So, if the geometric mean of 3 and a is 9 =>

9 = √(3a)

=> 9^2 = 3a

=> a = 9^2 / 3

a = 81 / 3

a = 27

Answer: the value of a is 27.

Answer Link

Otras preguntas

The ways in which our actions are initiated, sustained, and directed is called (Points : 2) need. drive. need-reduction. motivation.

A fraction in which the GCF of the numerator and the denominator is 1 is written in what?

Which best describes Patrick Henry?

Write an expression that has two terms. Your expression should have a variable and a constant.

Which one of the essential nutrients is most likely to cause dental caries? A. Carbohydrates B. Fats C. Minerals D. Proteins

What helped spread knowledge throughout china during its golden ages? What protected japan from invasion? what did samurai do for their daimyo? which of the fol

What is .175 as a percent and decimal,what is 3.22 as a percent and decimal,what is 0.012 as a percent and decimal,what is .86 as a percent and decimal.

What is a type of fluid friction that opposes the motion of objects as they move through air?

Study the following food chain: grass → rabbits → snakes → hawks. From this chain, you can correctly assume that each population A. is a species of herbivore.

How many 200 ml cups can be filled with 6 1.5 litre bottles