Posted by **Anonymous** on Monday, July 1, 2013 at 1:23am.

I don't understand this,so can you please explain more clearly. Where did you get the 1/5?

1.The point P divides the interval joining A(-1,-2) to B(9,3) internally in the ratio 4:1. Find the coordinates of P.

- MATH -
**Kuai **, Monday, July 1, 2013 at 2:13am
(4*9+ 1*-2)/(4+1), (4*3 + 1*-2)/(4+1)

((36-2)/5, (12-2)/5))

(34/5, 10/5)

(34/5, 2) or (6.4, 2)

- MATH -
**Steve**, Monday, July 1, 2013 at 3:32am
eh?

since the line is divided into ratio 4:1, you can consider it divided into fifths. P is 4/5 of the way along the line. That means its x-coordinate is 4/5 of the way from -1 to 9, and its y-coordinate is 4/5 of the way from -2 to 3.

The distance from -1 to 9 is 9-(-1) = 10.

4/5 of 10 is 8

Similarly for y, 4/5 of the way from -2 to 3 is 4.

So starting at A, add 8 to x and 4 to y to get

P = (7,2)

## Answer This Question

## Related Questions

- MATH - I don't understand this,so can you please explain more clearly. Where did...
- MATH - 1.The point P divides the interval joining A(-1,-2) to B(9,3) internally ...
- Algebra and Discrete Geometry - For points X (1,3,5) and (2,-4,6) find: a) the ...
- calculus - let f be the function f(x) = x^3 + 3x^2 - x + 2 a. the tangent to the...
- PHYSICS PLEASE HELP - A particle travels counterclockwise around the origin at ...
- ma - A point R divides a line PQ internally in the ration 3:4. Another point S, ...
- math - The line segment joining ( -3,-4) and (6,11) is to be divided in to three...
- math - 1) Write a translation rule that maps point D(7, –3) onto point D'(2, 5...
- Math - plot the point given in polar coordinates and find the corresponding ...
- math - The line segment joining P(-6,7) and Q(5,-2) intersects the y-axis at ...

More Related Questions