SOLUTION: I need to graph these equations and determine where they meet. I am stumped 20x + 400 10x + 600

Question 218205: I need to graph these equations and determine where they meet. I am stumped
20x + 400
10x + 600
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
I need to graph these equations and determine where they meet. I am stumped
y = 20x + 400
y = 10x + 600
--------------------
Use a couple of points to graph each equation:
y=20x+400
If x = 0, y = 400 giving you point (0,400)
If x = -10, y = 200 giving you point (-10,200)
---------------
y = 10x + 600
If x = 0, y = 600 giving you point (0,600)
If x = -10, y = 500 giving you point (-10,500)
--------------------
If you want to find the intersection of the two lines:
Substitute for "y" and solve for "x":
20x + 400 = 10x + 600
10x = 200
x = 20
---
Substitute for x and solve for "y":
y = 20*20 + 400
y = 400 + 400
y = 800
----------------------

Cheers,
Stan H.
RELATED QUESTIONS
I am trying to graph y=20x+400 and y=10x+600. What I understand is that for the first... (answered by Alan3354)

how do you graph y=20x+400 and... (answered by solver91311,josmiceli)

At the beginning of a walk, Roberto and Juan are 7.7 miles apart. If they leave at the... (answered by mananth)

Please help, I am having difficulty trying to figure Quadratic Equations. On page #575 of (answered by checkley75)

2x+3y=7 3x+4y=10 i need to find teh exact point where these two systems fo equations... (answered by solver91311,checkley77)

I have to to graph these two linear equations on a coordinate plane but i don't know what (answered by richwmiller)

(((14x2 � 20x +6))) I need to factor this polynomial completely and I am completely... (answered by checkley71,jcmtnez)

I need to graph these two linear equations x+y=9 and... (answered by josmiceli)