Find the value of x so that the line passing through the points (x, 2) and (-4, 5) is perpendicular to the line that passes through the points at (4,8) and (2, -1).
Type in the number only: x = _______

Question

Find the value of x so that the line passing through the points (x, 2) and (-4, 5) is perpendicular to the line that passes through the points at (4,8) and (2, -1). 
Type in the number only: x = _______

anonymous · Answer

can somebody help me with this and give me an answer and can u explain it later
plzplplpzlpzlz i don't have much time

anonymous · Answer

hi
i think i can help you. 
Do you know the slope formula?

anonymous · Answer

first you have to find the slope of the points:  (4,8) and (2, -1)

Now, you know that since the slope of this points is perpendicular to the slope of points  (x, 2) and (-4, 5), you have to get the negative reciprocal of the slope that you calculated.

do this first, and i tell you the next step.