You have questions? We got answers!

I need help with pre calc matrices?

Science & Mathematics by Anonymous 2018-06-16 23:36:29

Social Science

I need help with pre calc matrices?

1 answer

Can someone please help me with this problem: Triangle ABC has coordinates A(-2,4), B(1,3), C(5,y). Find all possible y-coordinates of point C if the area of triangle ABC is 8

  • Anonymous

    Case 1: 0.5| 1...3 |=8 .....| 5...y | .....|-2..4 | .....| 1..3 | => 0.5(3y-5)=8 => 3y=16+5 => y=7 => C=(5,7) Case 2: 0.5| 1...3 |=8 .....|-2...4 | .....| 5...y | .....| 1...3 | => 0.5(-3y+5)=8 => -3y=16-5 => y=-11/3 => C=(5,-11/3)

ReCapcha
Not a bot