Question

(MEDAL & FAN)

Which equation shows the substitution method being used to solve the system of linear equations?

x – y = 7
x = y + 3

Answer 1

it is x-y=7

Answer 2

A.
x = (7 – x) + 3

B.
x – (y + 3) = 7

C.
x – y = y + 3

D.
(y + 3) – y = 7 is my choices

Answer 3

everything blued is a -

Answer 4

that's right!

Answer 5

so do i use a b c or d i am lost

Answer 6

please, you have to use D

Answer 7

i will try it thank you

Answer 8

i will tell you right or wrong

Answer 9

yes, I'm waiting

Answer 10

can you help me with 2 more that way i can check

Answer 11

Yes!

Answer 12

What is the solution to the system of equations? i need 2 number for slope intercept form

http://static.k12.com/bank_packages/files/media/mathml_c54e6357d10d28554e1afa49011c16f6dda9011e_1.gif

Answer 13

please, if you apply the substitution method for solving your system, you find, the solution below:
x=-3, and y=-2
from the second equation of the system I get the value of x, as:
\[x=\frac{ 4+5y }{ 2 }\]substituting that value of x in the first equation of your system, you get:
\[5*\frac{ 4+5y }{ 2 }-3y=-9\]
please check my statements

Answer 14

ok thank you last one now

Answer 15

Ok! go please!

Answer 16

https://storage.googleapis.com/clipular-clips/4530423126294528/6601633364443136?GoogleAccessId=clipular2012 @appspot.gserviceaccount.com&Expires=1416687227&Signature=OETLMAzJxS3OCL9yby9A3bGBkiWezauhvQ8Aesm8w7NqNO1MXCDKp5W7jWoXSTuXfThzHL9Djka6SwLOw%2B3au3fOe02b1Wm%2BwpfuJNHUVn85mxa2LL5muOAV%2BKydb5mbGxeir2C51G5CK7zs3HTogeA1iFR4NezBjh314u2UCho%3D&md5=6d756b6faec5425b21457c2a14d39465&NOT_A_LINK

Answer 17

Sorry I can't see the page

Answer 18

highlight the whole thing not click the blue one

Answer 19

then copy and paste at top of serch engine

Answer 20

nvm lol now it works

Answer 21

http://static.k12.com/bank_packages/files/media/mathml_465c125993163872ea9b275109dbbbbd92a018c3_1.gif

The system of equations is coincident.

What are the missing values?

Answer 22

https://storage.googleapis.com/clipular-clips/4530423126294528/6601633364443136?GoogleAccessId=clipular2012 @appspot.gserviceaccount.com&Expires=1416687435&Signature=QwBWJm653xqFLlvsGLkp21THgCBn3OfHGEQqijw%2BdEpC8Dn914V5H8d1hnzqCCf3i3fh3nZNMgAB6mV3GJet2d0EDa7DpsSc%2B9qSqNcwXSo5NJTkHiWLJ2RCLr9%2FnNkigXAUz%2BgPwwZjvkgmsg0gVT0jgS%2FT6FdZef0Vrp%2FpUGA%3D&md5=6d756b6faec5425b21457c2a14d39465&NOT_A_LINK

Answer 23

lol it just sucks

Answer 24

why you say that the system is coincident? I don't understand

Answer 25

do you know what is the meanig of system coincident?

Answer 26

yes

Answer 27

Please tell me!

Answer 28

@boygame20

Answer 29

ok

Answer 30

http://www.mathnstuff.com/math/spoken/here/1words/c/c22.htm here this have all the meaning

Answer 31

Ok! I understand!

Answer 32

I think that the second equation is:
9x+3y=21, so the missing values,are:
3 and 21.

Answer 33

the coefficients of the second equation are the same of the first equation, namely 3x+y=7, multiplied by 3

Answer 34

ok well i try them

Answer 35

OMG I JUST DONE IT the ones i did made me fail will you help me agian

Answer 36

yours were all right

Answer 37

How many solutions are there to the following system of equations?

3x – 9y = 0
–x + 3y = –3

A.
0

B.
2

C.
infinitely many

D.
1

Answer 38

Ok! I help you, if you have other exercise, please tell me!

Answer 39

no i am good this mandatory i have to pass with 80%

Answer 40

I think A. as you can check using the substitution method

Answer 41

ok

Answer 42

you certain i not good with that method that why i failed

Answer 43

if you multiply both sides of the second equation, you get:
3x-9y=-3,
here the left side is equals to the left side of the first equation, nevertheless the right sides of the two equations are not equals, so it is impossible. That's because we have no solutions

Answer 44

ok it is the one you did before kinda

Answer 45

What is the solution to the system of equations?

http://static.k12.com/bank_packages/files/media/mathml_d676641518b9981930709d538c634ae09a39918d_1.gif

Answer 46

ok but next one please thank you though i get it now

Answer 47

Are you needing to show it being substituted?

Answer 48

i need it for my school i need it in slope intercept form

Answer 49

oh! Okay :D slope intercept form is simple......y=mx+b, correct?

Answer 50

yes

Answer 51

Are we working on the two equations? Or is that for something different?

Answer 52

i need the x and y that makes those true

Answer 53

oh! so we will just use substitution to find that.....okay?

Answer 54

Which equation do we need to turn into slope-intercept form?

Answer 55

yes i just need the anser in that form (sorry for my spelling)

Answer 56

none i just need the x and y i got confused

Answer 57

from the second equation I get:
\[x=-4+2y\]
inserting that value for x into the first equation, we have:
\[2(-4+2y)+y=-3\]
from which, y=1.
substituting y=1, into the expression for x, above, we have:
x=-2,
please check my statements

Answer 58

i got another 7 qustions after this

Answer 59

oh.....okay

Answer 60

I will let @Michele_Laino help you out because I have math of my own to do today as well :( It's difficult so I need to focus...sorry!

Answer 61

what is your new Mathematical question, please?

Answer 62

still this one he never got me past it

http://static.k12.com/bank_packages/files/media/mathml_d676641518b9981930709d538c634ae09a39918d_1.gif

Answer 63

from the second equation, I get:
\[x=-4+2y\]
now I'going to insert that expression for x, into the first equation, so I can write:
\[2*(-4+2y)+y=-3\]
please simplify this last equation, and find y

Answer 64

can you try i am trying to work number 8 your working 3

Answer 65

here are the steps:
\[-8+4y+y=-3\]
\[-8+5y=-3\]
\[5y=-3+8\]
\[5y=5\]
\[y=1\]

Answer 66

ok

Answer 67

umm do you know x please i in a rush i only got 30 mins left

Answer 68

now insert y=1, into the expression for x, namely
\[x=-4+2y\]
and write your result for x, please

Answer 69

so x=-2?

Answer 70

that's right!

Answer 71

ok next

Answer 72

In a recent golf match, Desmond’s score was 3 less than George’s score. Their combined scores totaled 187. Let d represent Desmond's score and g represent George's score.

Which pair of equations can be used to determine their scores?

A.
g = d – 3
d + g = 187

B.
d + g = 187
d – g = 3

C.
d = g – 3
d + g = 187

D.
d + g = 3
187 + d = g

Answer 73

opss wrong one

Answer 74

here let me get 6

Answer 75

Which equation shows the substitution method being used to solve the system of linear equations?

x + y = 6
x = y + 5


A.
x + y = y + 5

B.
x = (x – 6) + 5

C.
x + (y + 5) = 6

D.
(y + 5) + y = 6

Answer 76

for the golf match question, the answer is C.

Answer 77

ok i got 2 more for you

Answer 78

the right answer is D.

Answer 79

:/ i need to pass no joke please

Answer 80

i put d

Answer 81

I'm a serious boy , don't worry!

Answer 82

The system of equations is inconsistent.

What are the missing values?


http://static.k12.com/bank_packages/files/media/mathml_56c7fd0a18144c3c3e4379c77c9b6e184a7b51bb_1.gif

http://static.k12.com/bank_packages/files/media/mathml_e8e38041922035857054d4ea27e296efc8c85734_1.gif
and ok i need the black's filled in

Answer 83

blank

Answer 84

In one page I see only 5x, in the second page I see the equation x+3y=8

Answer 85

oh no worry i will get my mom to try it agian thank you if i fail i need you agian

Answer 86

Ok!

Answer 87

Sorry, what is the meaning of inconsistent system

Answer 88

I PASSED THANK YOU