# Solve the system of equations below by graphing them with a pencil and paper.

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• May 6th 2010, 02:27 PM
daniel323
Solve the system of equations below by graphing them with a pencil and paper. Choose the correct ordered pair (b, u).

u = -b + 21
u = -2b + 30
• May 6th 2010, 02:49 PM
pickslides
Graph the two lines. The answer is the point where they intersect.

(Rofl)
• May 6th 2010, 02:51 PM
daniel323
i got it how about this 1 Solve the system of equations below by graphing them with a pencil and paper. Enter your answer as an ordered pair.

y = -x + 2
y = -2x + 6
• May 6th 2010, 02:53 PM
pickslides
Exactly the same way you did the first one.

Make sure you have a ruler, pencil, eraser and steady hands.
• May 6th 2010, 02:56 PM
daniel323
wat do i graph
• May 6th 2010, 02:59 PM
pickslides
Quote:

Originally Posted by daniel323
wat do i graph

Each of these

$y =-x+2$
$y=-2x+6$

are straight lines, graph them both then following advice given in post #2.
• May 6th 2010, 03:02 PM
daniel323
cant do it
• May 6th 2010, 03:21 PM
pickslides
What have you tried?
• May 6th 2010, 03:23 PM
daniel323
wat am i suppose to graph the 6 and 2 or the x
• May 6th 2010, 03:27 PM
Anonymous1
Quote:

Originally Posted by daniel323
wat am i suppose to graph the 6 and 2 or the x

I showed you how to do this in a previous thread.

I also showed you how to solve a system.

Go try to figure out what is going on there, and come back with any serious questions.
• May 6th 2010, 03:35 PM
daniel323
the other problem the numbers are the same so it diffrent
• May 6th 2010, 03:42 PM
Anonymous1
Quote:

Originally Posted by daniel323
the other problem the numbers are the same so it diffrent

HINT: Multiply the first equation through by -2.
• May 6th 2010, 03:45 PM
daniel323
• May 6th 2010, 03:47 PM
Anonymous1
Quote:

Originally Posted by daniel323

How did you get that?

y = -x + 2
y = -2x + 6

Following the hint we multiply the first equation through by -2 to get:

-2y = 2x - 4
y = -2x + 6

Now what do you want to do?
• May 6th 2010, 03:50 PM
daniel323
how did u get 4 in there
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