-3x+y=–3
y=x-3
2006-07-12 05:48:52 · 7 answers · asked by Brandon ツ 3 in Science & Mathematics ➔ Mathematics
If you have aready answered one then I thank you dearly but I do not want to bother you continuously, so you do not have to answer.
2006-07-12 05:49:16 · update #1
-3x+y=-3 -> y=3x-3
Graph y=3x-3 and y=x-3, the y-intercept for both graphs is -3, the slopes are 3 and 1, respectively.
The only intercept of the two equations is (0,-3)
2006-07-12 05:53:51 · answer #1 · answered by Anonymous · 1⤊ 1⤋
If you can use a graphing calculator it is quit easy:
1. solve for y in the first equation.
2. put the equations in the calculator and graph them
3. use the intesect function (on the TI-82 and TI-83 you need the calc menue and go down to intersect).
Without a graphing calc, use graph paper and graph the two lines (by ploting points or using the slope and y-intercept). Since you are using graph paper you should be able to see where they intersect. This point is the solution.
Be sure to check your solution by plugging the point into both equations and see if the point is truely on each line.
2006-07-12 05:59:26 · answer #2 · answered by raz 5 · 0⤊ 0⤋
y = 3x - 3
y = x - 3
3x - 3 = x - 3
2x = 0
x = 0
plug back into above equation
y = 0 - 3 = -3
point of intersection for the two graphs is:
(0,-3)
ajm122904 is right!!
2006-07-12 06:02:39 · answer #3 · answered by bartathalon 3 · 0⤊ 0⤋
yo, Tim H, you do know that posting all your math problems online for other people to solve is cheating right? I went to the mathematics section and like half the first page was your questions... Do your own homework.
2006-07-12 06:17:25 · answer #4 · answered by agfreak90 4 · 0⤊ 0⤋
You could do your own homework instead of just posting all of the questions.
2006-07-12 06:45:46 · answer #5 · answered by DoctaB01 2 · 0⤊ 0⤋
x = -3
y = -6
2006-07-12 05:54:19 · answer #6 · answered by thematrixhazu36 5 · 0⤊ 0⤋
just solve it by substitution or linear combinations instead.
2006-07-12 05:52:49 · answer #7 · answered by Anonymous · 0⤊ 0⤋