Math Is Fun Forum

jxharmon

Member

Registered: 2007-01-08

Posts: 104

rewrite the equation help by checking

rewrite the equation 4x - 10y = 11 as a function of x

a. y= -2/5x + 11

b. y=2/5x-11

c. y = 2/5x -11/10

d. y = -2/5x + 11/10

this is my thinking 10y = 4/10x + 11/10
                             y =2/5x + 11/10
                             correct??

Last edited by jxharmon (2007-02-14 13:13:27)

pi man

Member

Registered: 2006-07-06

Posts: 251

Re: rewrite the equation help by checking

4x - 10y = 11
-10y = 11 - 4x    (subtract 4x from each side)
y = -11/10 + 4x/10  (divide each side by -10)
y = (2/5)x -11/10 (rearrange and simplify)

So the answer is C