Which equation is not a linear equation?
f. -4v+2w=7 g. x/4=y h. x=-5 j. 2/x+3/y=6

H. x = -5

Explanation:

Linear equations come in the form: y = mx+b

F. -4v+2w = 7  ---> even though it doesn't look like y=mx+b, we can rearrange the equation to look like it. (note: we don't need to have varriables y or x; all we need are 2 different variables [letters])

-4v + 2w = 7

+4v           +4v

2w = 4v + 7

2             2

w = 2v + 7/2

G. x/4 = y ---> this is in the form y = mx+b

  y = x/4   also can be written as: y = 1/4x

J. 2/x + 3y = 6 ---> we can also rearrange this to look like y = mx + b

  2/x + 3y = 6

 -2/x             -2/x

3y = -2/x + 6

3                 3

y = -2/3x + 6

H. x = -5  ---> we only have 1 variable (x), so it cannot be a linear equation

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j