Question

2. Find the value of x
when three points
(1,8) (5, 12) and (x, 28) lies on
straight line
Plzzz answer this for assignment​

Answer 1

Answer:

x= 4.2

Step-by-step explanation:

if the points lie on a straight line then the area of the triangle they form = 0

hence by are of triangle formula :

0 = 1/2 | x1 (y1-y2) +x2 (y2-y3) +x3 ( y3-y1) |

0=  1 ( -4) + 5 ( -16) + x (20)

0= | -4-80+20x |

84 = 20x

x=4.2/

plz mark brainliest tyvm!!!