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dexar [7]
2 years ago
13

Point C(3.6, -0.4) divides AB in the ratio 3:2. If the coordinates of A are (-6, 5), the coordinates of point B are ___. If poin

t D divides CB in the ratio 4 : 5, the coordinates of point D are ___.

Mathematics
2 answers:
hjlf2 years ago
7 0

Answer:

well if that person is correct then it should look like this.

Step-by-step explanation:

Point C(3.6, -0.4) divides AB in the ratio 3:2. If the coordinates of A are (-6, 5), the coordinates of point B are ___. If point D divides CB in the ratio 4 : 5, the coordinates of point D are ___.

your welcome ;0

kari74 [83]2 years ago
4 0
When a point divides a line segment into ratios of k1:k2, the formula to find the coordiates of the point is:
x=(k2*x1+k1*x2)/(k1+k2), y=(k2*y1+k1*y2)/(k1+k2), 
(x1,y1) being the coordinates of the starting point, and (x2,y2) coordinates of the end point. 
in this case, 3.6=[2*(-6)+3x2]/5
-12+3x2=18
3x2=30
x2=10

use the same method to find y2: -0.4=(2*5+3y2)/5
3y2=-12
y2=-4
so the the coordinates of B is (10,-4)

use the same method to find the coordinates of D.

the answer I've got for D is (58/9, -2) please double check my calculation.
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