MATH...somewhat urgent
posted by Lisa on .
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 (03)
Now I solve for x, so I will let y be 0: 6(0)+5x=18
5x=18
x=18/5
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 4x12=3y
4(0)12=3y
12=3y
y=4
(0,4)
4x12=3y
4x12+12=3(0)12
4x=12
x=3
(3,0)
the y intercept is (0,4)
The third problem is finding slope: x+4y=8
x(0)+4y=8
4y=8
y=2
(0,2)
x+4(0)=8
x=8
(8,0)
slope=1/4
Did I do these right?

first one is correct
second one:
in 4x12+12=3(0)12
you added 12 on one side, but subtracted on the other.
should have been
4x12+12=3(0)+12
4x = 12
x = 3, so xintercept is (3,0)
last one:
change x+4y=8
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. 
Thank you

2x+4y+1=0
y= 21/3x
y2x+2=0
3y9x1=0