anonymous
  • anonymous
Help pleaseee algebra 1- ill give you a lot of medals and ill fan if you help me
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Godlovesme
  • Godlovesme
ok i think graphing would be the easiest way to do this :D do u have geogebra app?
Godlovesme
  • Godlovesme
@blahhedup101 u there?
anonymous
  • anonymous
yeah im here

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anonymous
  • anonymous
@Godlovesme
anonymous
  • anonymous
and no i dont have a graphing app
Godlovesme
  • Godlovesme
hmm is it fine if i graph it and u determine how many solutions the line will have? solution is just the intersection so it's easy :)
anonymous
  • anonymous
ok sounds good :)
Godlovesme
  • Godlovesme
great! :D so first are u familliar with the slope-intercept formula?
Godlovesme
  • Godlovesme
y= mx + b ?
anonymous
  • anonymous
sorry my mom was talking to me
anonymous
  • anonymous
but yes i am familiar with y=mx+b
Godlovesme
  • Godlovesme
it's cool :) so i guess you know that m stands for slope and b represents the y-intercept
anonymous
  • anonymous
yes
Godlovesme
  • Godlovesme
awesome! so if two lines have the same slope, it means thy are parallel. And if two lines are parallel, they will NEVER intersect which means there will be no solution so do u see any lines with the same slope?
anonymous
  • anonymous
oh ok that makes sense and idk i dont know how to graph them
Godlovesme
  • Godlovesme
no we dont need to graph it if we find any two equations that have the same slope for example y= 3x +1 and y= 3x +2 have the same slope,3 so the lines are parallel so there is no solution ( they will never intersect) make sense?
anonymous
  • anonymous
ohhhhhhhhh
anonymous
  • anonymous
ok ummm
anonymous
  • anonymous
what about the last on is that no solution?
Godlovesme
  • Godlovesme
so if u look at the first pair, you can tell that they have the same slope because -x is the same thing as -1x
anonymous
  • anonymous
and the second last one is no solution
Godlovesme
  • Godlovesme
hold on we're on the first one
Godlovesme
  • Godlovesme
y= -x -2 y= -x -6 do this equations have the same slope? ^^
anonymous
  • anonymous
um no
Godlovesme
  • Godlovesme
um actually they do, look -x means -1x so we will have y= -1x -2 y= -1x -6 they both have a slope of -1
anonymous
  • anonymous
ohhh... i thought they didnt because of the 2 and the 6
Godlovesme
  • Godlovesme
that's the y-intercept , the slope is the one with x :)
anonymous
  • anonymous
i dont get these they are very confusing sooo the numbers dont count ?
Godlovesme
  • Godlovesme
sorry about the confusion :/ butt here y=mx+b we will be given numbers for m and b like y= 2x + 3 m = slope b= y-intercept so in this case our slope is 2 and the y-intercept is 3 got it?
Godlovesme
  • Godlovesme
|dw:1433841887514:dw|
Godlovesme
  • Godlovesme
@blahhedup101 was that confusing?
anonymous
  • anonymous
idk i just suck at everything that has to do with graphs and slopes :/
Godlovesme
  • Godlovesme
no it's okay just remember m represents slope and b represents y-intercept okay
anonymous
  • anonymous
but youre explaining everything very well :)
anonymous
  • anonymous
thanks for not leaving :)
Godlovesme
  • Godlovesme
my pleasure dear (:
Godlovesme
  • Godlovesme
ok so can u remember that m means slope and b means y-intercept ?please :DD sorry if i sound rude
anonymous
  • anonymous
yes ma'am i remember
anonymous
  • anonymous
im just confused about how do you know if its one solution or infinity
Godlovesme
  • Godlovesme
we'll get there but for now you have to know how to determine the slope and y-intercept |dw:1433842646745:dw|
Godlovesme
  • Godlovesme
so if m is slope then whats the slope in the above equation?
anonymous
  • anonymous
2
Godlovesme
  • Godlovesme
YES!! :DDDD *high fives* great job! :D what about the y-intercept?
anonymous
  • anonymous
3... i understand all of that
Godlovesme
  • Godlovesme
oh okay so now do u understand why i said the first two pairs have the same slope?
anonymous
  • anonymous
the y=-x-2 ?
Godlovesme
  • Godlovesme
yes
anonymous
  • anonymous
yess
Godlovesme
  • Godlovesme
awesome so since they are parallel they will be included in the "no solution" section :) got it?
anonymous
  • anonymous
yeahh is the next one 1 solution ?
Godlovesme
  • Godlovesme
YES! awesome job! :D
anonymous
  • anonymous
is the rest 1 solution?
Godlovesme
  • Godlovesme
no the third one is different and maybe the rest as well for the 3rd one we have y=3x+4 and 2y=6x+8 lets change 2y= 6x+8 in to y=mx+b form by dividing 2 from both sides 2y/2 = 6x/2 + 8/2 y= 3x+4 now we have the SAME equation! :O this means the lines have infinitely many solutions
anonymous
  • anonymous
ohhh
Godlovesme
  • Godlovesme
was that confusing?
anonymous
  • anonymous
not the way you explained it but if i were to do it by myself id be lost
Godlovesme
  • Godlovesme
im glad :D let's move to the fourth one we have y=-3 and x= -6 one sec, i'll post the screenshot of what the graph will look like
anonymous
  • anonymous
ok :)
Godlovesme
  • Godlovesme
http://prntscr.com/7f1e2v so how many intersections do u see? :P
Godlovesme
  • Godlovesme
i mean where the blue and red line intersects
anonymous
  • anonymous
is that 1 solution?
Godlovesme
  • Godlovesme
yes, you're doing great! :DD take a look at the last one http://prntscr.com/7f21uy
anonymous
  • anonymous
one solution
Godlovesme
  • Godlovesme
YAYY! WE'RE DONE AND AWESOME JOB!! :DDD
anonymous
  • anonymous
:) so its supposed to look like this?
1 Attachment
Godlovesme
  • Godlovesme
yes :)
anonymous
  • anonymous
Thank youu so muccchhhhhhhhh
Godlovesme
  • Godlovesme
you're very welcome (:
anonymous
  • anonymous
have a nice dayyyy

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