Friday

January 30, 2015

January 30, 2015

Posted by **Connie** on Friday, April 25, 2008 at 2:54pm.

Can anyone please give me some ideas how to do it without graphing it out? THANKS A LOT!

- MATH -
**Damon**, Friday, April 25, 2008 at 3:32pmThe centers are at (3,5) and at (7,5) along the horizontal line y = 5 and 7-3 = 4 apart

left radius = 5

right radius = 3

so

the points lie on vertical line x = something an equal distance above and below y = 5

so

triangle

base = 4 along y = 5 line

left leg = 5

right leg = 3

let's use law of cosines to find the angle on the left, between the y = 5 line and the long side length 5

3^2 = 5^2 + 4^2 - 2*5*4 cos A

9 = 25 + 16 - 40 cos A

32 = 40 cos A

A = 36.87 degrees

now the distance from x = 3 to our desired vertical line is

5 cos A which is 5 (32/40) = 4

so our line is

x = 3 + 4 = 7

which we could have said earlier seeing that our triangle is

3, 4, 5 and therefore a right triangle

- MATH -
**Jordan**, Friday, April 25, 2008 at 9:32pmWhat do you mean?

- MATH -
- MATH -
**Jordan**, Friday, April 25, 2008 at 9:32pmWhat do youm mean?

**Answer this Question**

**Related Questions**

maths pleaaaase - The point X and Y are 8cm apart Draw a scale drawing of the ...

algebra - how would i find an equation of a line that goes through points(1,6) ...

help! - Can you please give me one of them so I cansolve for the other one?...

Algebra - Can someone check my answers? 1. Write the equation of the line that ...

Math Question - Laura was given two points (3,-2) and (-2,4) and was asked to ...

Algebra - Wrtie an equation of a line passing through (6,10) and (6,-6 y= mx + b...

intermediate algebra - Write the equation of the line: The points are at (-8,-6...

Math -Quadratics Help! - I have a test tomorrow with a few sample questions that...

Math - Quadratics & Analytical Geometry - I have a test tomorrow with a few ...

trig - Two circles of radii 5 and 3 cm, respectively, intersect at two points. ...