1. points A,B,C are collinear such that AB=BC=12. the coordinate of A is 2. Find the coordinates of B and C if the coordinate of B is grater than A.
2. Points L,S,D are collienear such that LS= 5 and SD=9 and LD= 14. Find the coordinates of L and D when the coordinate of S is 7 if :
a) the coordinate of D is greater than the coordinate of S.
b) the coordinate of D is less than the coordinate of S.
THANKS A LOT FOR HELPING!!! : )
2007-06-22 17:37:24 · 3 answers · asked by lala-la 4 in Science & Mathematics ➔ Mathematics
1. b=14, c=26
2. a. L=2, D=16
b. L=12, D=(-2)
2007-06-22 17:49:49 · answer #1 · answered by Marie B 2 · 0⤊ 0⤋
Points are collinear if they lie on the same line.
1. A = 2 then B = A + AB = 2 + 12 = 14
and C = A + AB + BC = 2 + 12 + 12 = 26
2. the arrangement of the point is L, S, D
a) D = S + SD = 7 + 9 = 16
** L = S - LS = 7 - 5 = 2
b) D = S - SD = 7 - 9 = -2
** L = S + LS = 7 + 5 = 12
2007-06-22 18:02:40 · answer #2 · answered by sinanissa 2 · 0⤊ 0⤋
B = 2 + 12 = 14
C = 2 or 26. It does not say that the points are distinct. C might be the same point as A.
2a. D:7 + 9 = 16 L:16 - 14 = 2
2b. D:7 - 9 = -2 L:-2 + 14 = 12
2007-06-22 18:09:21 · answer #3 · answered by TychaBrahe 7 · 0⤊ 0⤋