# geometry

posted by .

Find the geometric mean between 7 and 21

I do not have a clue where to start the equation given was
extreme/extreme=mean/extreme
so (mean)(mean)=(extreme)(extreme)

• geometry -

let the geometric mean be x
then x/7 = 21/x
x^2 = 147
x = ± √147

## Similar Questions

1. ### extreme values of the function

Using analytical method, find the extreme values of the functions on the interval and where they occur. 1. f(x) = ln(x+1), 0<=x<=3 2. f(x) = sin(x+ pi/4), 0<=x<=(7pi)/4 Thanks in advance.
2. ### extreme values - more...

find the extreme values of the function on the interval and where they occur. f(x) = |x-1|-|x-5|, -2<=x<=7
3. ### science

I have a science project about extreme habitat comparison.I have to choose two similar organisms that live in the same extreme habitat and compare them to find out how they are designed to survive.Can someone give me a good place to …
4. ### Maths/physics

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with …
5. ### Math

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with …
6. ### Math

Given the following LP model (represented abstractly with decision variables X and Y), find the optimal solution using the ‘graphing’ approach. Minimize 5X + 2Y Subject to: 4X + 2Y >= 80 3X + 4Y <= 132 X + 3Y >= 45 2X …
7. ### pre calculus

Hi, I am having a problem trying to find and understanding how to find the extreme values. I have a problem which I can't do. Will someone please explain for me how to do it. I would like to be able to do other similar problems. This …
8. ### pre calculus

Hi, I am having a problem trying to find and understanding how to find the extreme values. I have a problem which I can't do. Will someone please explain for me how to do it. I would like to be able to do other similar problems. This …
9. ### Statistics

A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value?
10. ### Math - extreme values

Identify the critical points and find the extreme values on the interval [-1,-5) for f(x)=cosx+xsinx+3 I've taken the derivative which gives me f'(x)=xcos(x). I know I have to solve to get the critical points and then plug in the critical …

More Similar Questions