SOLUTION: help graph 4x + 5y = -2 4y + (-x) = 11

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: help graph 4x + 5y = -2 4y + (-x) = 11      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 206129: help graph 4x + 5y = -2
4y + (-x) = 11
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!


Given: system%284x+%2B+5y+=+-2%28red%28EQN1%29%29%2C4y+%2B+%28-x%29+=+11%28green%28EQN2%29%29%29

In red%28EQN1%29, let Fx=0:
4%280%29%2B5y=-2 ---> cross%285%29y%2Fcross%285%29=-2%2F5
red%28y=-2%2F5%29, Y-Intercept (0,-0.4)
Let Fy=0
4x%2B5%280%29=-2 ---> cross%284%29x%2Fcross%284%29=cross%28-2%291%2Fcross%284%292
red%28x=-1%2F2%29, X-Intercept (-0.5,0)

In green%28EQN2%29, let Fx=0:
4y-0=11 ---> cross%284%29y%2Fcross%284%29=11%2F4
green%28y=11%2F4%29, Y-Intercept (0,11/4) or (0,2.75)
Let Fy=0
4%280%29-x=11 ---> cross%28-1%29x%2Fcross%28-1%29=11%2F-1
green%28x=-11%29, X-Intercept (-11,0)
---> red%28EQN1%29; green%28EQN2%29

Thank you,
Jojo