Question

Solve the following system of equations using Substition y= -2x - 2 and 9x + 4y = -11

Answer 1

u can solve this well x first by plugging in -2x-2 into 4
so.. 9x+4(-2x-2)=-11 and solve for x! :)

Answer 2

u dont get it?

Answer 3

and thats using substitution?

Answer 4

yeah

Answer 5

cuz u have y= so that means that whatever y= or x= u'll just plug it into the other equation. :)

Answer 6

thanks

Answer 7

ur welcome! i hope i helped! :l

Answer 8

so 9x+4(-2x-2)=-11 do i distrubute the 4 over?

Answer 9

yes sir

Answer 10

so x=3?

Answer 11

let me check.....

Answer 12

ok thank you

Answer 13

its -3

Answer 14

ok and that is all i need to do that will be the answer to the whole equation?

Answer 15

no...... u need to solve for y now so basically plug in -3 into the first equation y= thats the easier one and ull get ur x :)

Answer 16

so y=4?

Answer 17

yes!!!! good job! :))

Answer 18

XD Thanks May i ask you others?

Answer 19

depends on how many and r they similar??
cuz though im taking pre-calc i'm a little rusty on some math problems

Answer 20

ok they kinda are

Answer 21

shoot

Answer 22

Solve the follwoing system of equations ing Linear Combinations
4x + y and -3x - 5y = -8

Answer 23

4x+y does not have an = sign?

Answer 24

sorit is 4x + 2y = 20 and -3x - 5y = -8

Answer 25

okay for this one u would solve for y again id choose 4x+2y=20 cuz it easier
so u would solve for y... do u know how 2 do that?

Answer 26

no plz help

Answer 27

okay so u have 4x+2y=20
u would divide by 2 on both sides u would have
2x+y=10
then u'll move the 2x on the other side so u'll have y=-2x+10 now u can plug y into the other equation get it????

Answer 28

kinda would i do -3x - 5(-2x + 10)=-8

Answer 29

which equation did u plug it into?

Answer 30

-3x - 5y = -8

Answer 31

wasn't it 9x+4y=-11?

Answer 32

Solve the follwoing system of equations ing Linear Combinations
4x + y and -3x - 5y = -8 this is the new equation

Answer 33

oooo u shouda gave me head up then :l
ahhh.
okay so does 4x+y have an equal sign?
wait didnt we do this one already???

Answer 34

no we didnt in my packet question number 14 is

Answer 35

okay NEVERMIND what u said before about plugging it into the-3x-5y=-8 is right sorry im like losing track

Answer 36

its ok want me to stop?

Answer 37

no its fine for now :) is it fine if i let u know when im like done and need 2 go 2 sleep?

Answer 38

yes sorry this is so late i need to get this done for my gf

Answer 39

seriously? she's making u do this???
that's pretty messed up
no wait ur pretty messed up that u played the part of the smart guy ur lying to her! :0 uhg! im apalled!

Answer 40

no i told her i was using help i wouldnt lie to her!!!

Answer 41

hmmm sure!!!!! thats wat they ALL say even 2 cyber ppl! ugh!!!
no its okay i guess just dont lie to her thats mean!
okay i'll help up to my limit :)

Answer 42

thank you.

Answer 43

now x=6 do i put that into the equation 4x + 2y = 20?

Answer 44

bravo! yes sir :)

Answer 45

y=-2

Answer 46

no.. y=2

Answer 47

how 4 times 6 plus 2y equal 20
24 plus 2y equals 20
-24 on both sides
then divide by 2

Answer 48

i'm so sorry i though it was for y my bad :( ur right sorry

Answer 49

oh ok thanks

Answer 50

the next question are you ready?

Answer 51

sure thang

Answer 52

\[3x ^{2}y ^{-2}\times2x ^{-3}y ^{2}\div6x ^{2}y ^{2}\times7xy ^{-2}\]
they want to simplify it

Answer 53

this'll take some time i'm solving it ......

Answer 54

ok thanks

Answer 55

wait so their both multiplied?

Answer 56

like individually?

Answer 57

its hard to do on here 3xsquared times y -squared over 6x squared times y squared times 2x-cubed times ysquared over 7xy -squared

Answer 58

okay so are 3x^2y^=2 and 2x^x3y^2 multiplied?

Answer 59

kinda its 3x^2y^-2 over 6x^2y^2 times 2x^-3y^2 over 7xy^-2

Answer 60

oooooooooooooooooooooooooo okay that makes sense easy!

Answer 61

ok

Answer 62

after all the cross cancelations u would obtain....
3x/6x^5 (multiplied by) 2/7 and u when then get 6x/42x^2 simplified would then be x/7x^5

Answer 63

so x over 7^5

Answer 64

x over 7x^5

Answer 65

ok ready for the next one?

Answer 66

yea can u limit them to a couple now plz?

Answer 67

2 to 4 ok? i know its going on 1am here

Answer 68

yeah here it 10:51 pm but i have school tomorow so yaeh its ok.
dang ur so determined for ur gurl thats cute! she is very lucky :)
keep it going

Answer 69

hello? u still there?

Answer 70

c ya im out