i need help solving this system by graphing??..

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i need help solving this system by graphing??..

Mathematics
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\[\left\{ 2x+y=-7 \right\} \]
y=2x-7
\[\left\{ -3x+2y=14 \right\}\]

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Other answers:

{−3x+2y=14} -2y -2y -3x=12 /-3 /-3 x=-4
\[\{\begin{matrix}2x + y = -7 \\ -3x+2y = 14\end{matrix}\}\]
ok i got through the first step
To solve by graphing, rewrite them in the standard y=mx + b form and graph each one. Then find where they cross.
wait, im confused??
2x+y=−7} in y=mx+b for its like this y=2x-7
i plug in the other equation into y=mx+b
If you are asked to solve by graphing you have to write the equations in standard form and graph them.
yess
yes
so now i jst do this
y=2(-4)-7
y=-8-7
\[2x + y = -7 \implies y = -2x + -7\] So draw that line on some graph paper. \[-3x+ 2y = 14 \implies y = \frac{3}{2}x + 7\]
???
You don't do any algebra when you solve by graphing.
then hyou make a table of values then you get your coordinates and graph them on the graph and when it makes a straight line you draw it throughth and make sure you xtende the line
(Other than the algebra to get the equation into standard form)
wait so how do i get the corrdinates?
by using numbers for x and psubititing it to the equation and you get you x and y then you graph them
yes i already have some graphed because i have a multiple choice.
ok
if you needl help ask me
yes i do
ok
i dnt noe how to get the y value?
ok what is your first eqution
do i jst plug it into the equation
whats the equation
2x+y=-7
Just plot 2 points and draw a straight line that goes through each of them.
Set x=0 for the first point and figure out what y is. Then set y = 0 for the second point and find what x is.
polpak i tryed that its doesnt help
either way i dnt need to graph them they r alrdy graphed
ok good
Oh, then just check to see which ones go through the points you plot.
ok i will check.
but do you get how to get x an y
no i dnt
yoplak you mean at which oints do they intersect
i tried to check on the graph and didnt understand
so ok diid you changed the equation they give you to y=mx+b form
yes
y=2x-7
what are the equations that you changed
the top one which is 2x+y=-7
ok
so do i jst plug in the x value that i got
which was -4?
can you attach this work and give me the linnk
how?
what numbers diid you use for x
ask one of your parents
ohh the choices u mean??
ok
a.(-4,-1) b.(-4,1) c.(4,1) d.(4,-1)
i think its either a or b.
wht is the questiom
solve the system by graphing
ok diid you grpah the equatios
noo they r alrdy graphed they r the choices too withthe x and y values
what doe the graph show does it show 2 lines crossing each other
yes
at what point do they intersect
in other words cross at which 2 points
which one??
a is 0 n 6 i think
both of the lines
how do i knoe they r like in the middle of 2 #s?
can you make an attachmen t to this work so i can see this
ask your mom or dad
so i can help you better and faster
i wuld have to scan it to the comp.
yes
ill see wait a lil
ok
u there
yes
diid you scan it
im doing it rite now
ok
what grade you in
8th and u??
me too
ohh
am good at math i diid this already
i knew it your were in 8th
ohh im not so good
are you finsih scaning
ok its saving
ok give me the link
i cant find it
wait a lil plz
ok
ohh it look all weird
how
1 Attachment
let me scan it again
you made it uupside down
yea i noe im scanning it again.
ok how many questions you have got i can help you
quite a feww.
ok am happy to help
are you doing scanning
yes
ok
plz give me the link
1 Attachment
ohh sry i gave u the wrong one
ok it wont open though
1 Attachment
ohh that was the other side let me do it one more time srry.
make it clear becuse it hard to understand the questions
i cant see th egprah for question 3 it confusing its dark
i noe thats the best ican get it too
ok so why are the graphs colored
idkk
because on my paper they r shaded with like gray n black
why though
because thats how they r
heyy r u still there??
yes
ok
whicc question you working on
4.
its a -4,-1
how do u noe?
jst tell me how u got -1?
ok if you plugg -4 for bopth equations for x you r x will be -4 and y -1 for both equations
i pluged it in and got this
y=2(-4)-7
y=-8-7
which equals 15 ???
???
heyy
r u still there???
hey
yeah

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