SOLUTION: Use systems of simultaneous equations to find the coordinates of the points of intersection for these two functions, y=1/4x+4, y=4/x, with working

Algebra ->  Coordinate-system -> SOLUTION: Use systems of simultaneous equations to find the coordinates of the points of intersection for these two functions, y=1/4x+4, y=4/x, with working      Log On


   

Question 877361: Use systems of simultaneous equations to find the coordinates of the points of intersection for these two functions, y=1/4x+4, y=4/x, with working
Answer by Edwin McCravy(20059) About Me  (Show Source):
You can put this solution on YOUR website!
Which do you mean by
y=1/4x+4
y = (1/4)x+4, y = (1/4x)+4, or y=1/(4x+4) ????
If you mean the first one then
y+=+%281%2F4%29x%2B4
Substitute 4/x for y
4%2Fx+=+%281%2F4%29x%2B4
Multiply through by LCD = 4x
16+=+x%5E2+%2B16x
x%5E2%2B16x-16=0
Solve with the quadratic formula
Edwin