Answers

1. The value of x is 5, if a, b, and c are collinear points.

   According to the given question.

   a, b, and c are collinear points.

   Which means points a, b, and c both lie in a same line.

   b is between a nd c .

   Also, ab = 12

   bc = 5x – 2

   and ac = 3x + 20

   Since, b lies in between a and c

   Therefore,

   ab + bc = ac

   12 + 5x – 2 = 3x + 20

   ⇒ 10 + 5x = 3x + 20

   ⇒ 5x – 3x = 20 – 10

   ⇒ 2x = 10

   ⇒ x = 10/ 2

   ⇒ x = 5

   Therefore, the value of x is 5.

   Find out more information about collinear points here:

   https://brainly.com/question/5191807

   #SPJ4

   Reply