Posted by Lisa on Sunday, November 22, 2009 at 5:36pm.
I have three problems I would like checked please.1: I need to graph and find the y intercept of 6y+5x=-18
First I want to solve for y therefore I will let x be 0: 6y+5(0)=-18
6y=-18...I will now divide
y=-3 Therfore the first set to plot would be (0-3)
Now I solve for x, so I will let y be 0: 6(0)+5x=-18
My second pair to plot is (-18/5,0)
the y intercept is (0,-3)
The second problem is the same concept as one, so I will not work it out as much herethe problem is 4x-12=3y
the y intercept is (0,-4)
The third problem is finding slope: x+4y=8
Did I do these right?
- MATH...somewhat urgent - Reiny, Sunday, November 22, 2009 at 5:46pm
first one is correct
you added 12 on one side, but subtracted on the other.
should have been
4x = 12
x = 3, so x-intercept is (3,0)
to 4y = -x + 8
y = (-1/4)x + 2
comparing it to y = mx + b
we can see the slope is -1/4
your intercepts for the last one are correct.
- MATH...somewhat urgent - Lisa willsomeone look at this please, Sunday, November 22, 2009 at 5:51pm
- MATH...somewhat urgent - ashleigh, Friday, February 5, 2010 at 3:23pm
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