Question

Solve the system by substitution. Check your solution.

4072-03-01-06-00_files/i0160000.jpg
a.
(15, 15)
c.
(13, 12)
b.
(10, 12)
d.
(7, 9)

Answer 1

@i_love_bands26 @Lady.Liv1776 @ help

Answer 2

What's the system of equations?

Answer 3

m http://media.education2020.com/evresources/4072-03-01-06-00_files/i0160000.jpg

Answer 4

that

Answer 5

just fanning you

Answer 6

the m was a accident

Answer 7

@Ziferot help

Answer 8

Okay.

a - 1.2b = -3
0.2b + 0.6a = 12

a - 1.2b = -3

Add 1.2b to both sides:

a = 1.2b - 3

Substitute 1.2b - 3 into the 2nd equation for 'a':

0.2b + 0.6a = 12

0.2b + 0.6(1.2b - 3) = 12

Distribute 0.6:

0.2b + 0.72b - 1.8 = 12

Add 0.2b + 0.72

Answer 9

do i have to do that equation?

Answer 10

brb

Answer 11

0.2b + 0.72b = ?

Answer 12

Do you know how to add that?

Answer 13

just had to get a graphing calulator

Answer 14

how to add letters

Answer 15

0.2b + 0.72b is the same as 0.2 + 0.72, but you just put the variable b next to it.

Answer 16

how?

Answer 17

@Ziferot my page says you are on two questions

Answer 18

0.2 + 0.72 = ?

Answer 19

how to put the variable in?

Answer 20

Just put it next to the number..like in 0.2b

Answer 21

it says 0

Answer 22

@Lady.Liv1776 do you know?

Answer 23

0.2 + 0.72 = ?

Answer 24

i try that

Answer 25

What did you get?

Answer 26

didn't work

Answer 27

Try again

Answer 28

have to go

Answer 29

be right back

Answer 30

@igreen @Ggirl99 @i_love_bands26 @Lady.Liv1776 @Ziferot @undeadknight26 I AM BACK

Answer 31

@trinity123 HELP

Answer 32

@iGreen HELP

Answer 33

0.2b + 0.72b = 0.92b

Answer 34

So we have:

0.92b - 1.8 = 12

Add 1.8 to both sides, 12 + 1.8 = ?

Answer 35

@chasity.ambs HELP

Answer 36

What's 12 + 1.8?

Answer 37

K give me a minute

Answer 38

@daiglejeremy101 what is the question

Answer 39

Solve the system by substitution. Check your solution.
http://media.education2020.com/evresources/4072-03-01-06-00_files/i0160000.jpg
A.
(15, 15)
c.
(13, 12)
b.
(10, 12)
d.
(7, 9)

Answer 40

A is the answer i am pretty sure @daiglejeremy101

Answer 41

THANK YOU @chasity.ambs

Answer 42

@chasity.ambs Please do not give answers, it's against OpenStudy's Code-of-Conduct. We are here to guide the asker to the answer, so we need his/her participation.

Please read the \(\bf\color{blue}{\underline{{\href{http:///openstudy.com/code-of-conduct}{Code-of-Conduct}}}}\) to learn more.

Answer 43

Your welcome @daiglejeremy101 You can put this solution on YOUR website!
here we have to find out values of "a" and "b" by substitution method and verify the solution.
a-1.2b = -3 ...............Equation-1
0.2b+ 0.6a= 12 ...............Equation-2
From Equation-1:
a = (-3 + 1.2b )= (1.2b - 3)...Equation-3
Now substitute "a" from above (Equation-3) into Equation-2 to get following equation:
0.2b + 0.6(1.2b-3)=12
0.2b + 0.72b - 1.8 = 12
0.92b - 1.8 = 12
0.92b = 12 + 1.8 = 13.8
b = 13.8/0.92 = 15


Therefore b = 15 Substitute b=15 into Equation-3 to get "a" as below:
a = 1.2b - 3 = 1.2*15 - 3 = 18 - 3 = 15
Hence values of : a=15 & b=15
Verification of Solution:
--------------------------
Substitute values of a & b into Equation-1 to get -3 as below:
a-1.2b = 15 - 1.2*15 = 15 - 18 = -3 --------> a-1.2b= -3
Now substitute values of a & b into Equation-2 to get 12 as below:
0.2b+ 0.6a = 0.2*15 + 0.6*15 = 3 + 9 = 12 -------> 0.2b+0.6a=12
thats it....
B.Shridhar is that better @iGreen if you can show them how to do with out pen an paper be my guest!!!!

Answer 44

CANT IT IS E2020

Answer 45

I post that to make @iGreen Happy sorry to confuse you @daiglejeremy101

Answer 46

THAT IS OK

Answer 47

@chasity.ambs You copy & pasted that..and even if you didn't you weren't supposed to give the answer out..we need participation of the Asker.

Answer 48

I showed him how i got the answer so get off my CASE!!! @iGreen

Answer 49

next question

Answer 50

Jeannie is 8 years older than her younger sister April. When added together, their ages equal 198. How old is April?
A.
27
B.
35
C.
95
D.
103

Answer 51

you know this bohotness girl

Answer 52

@GhostBirdSeriesNerd help please

Answer 53

http://www.jiskha.com/ use this web site it may be some type of help.... I cant tell you answer so use the web site @daiglejeremy101

Answer 54

thank you so much :) :)

Answer 55

Any time i can help

Answer 56

Cynthia has a cup full of dimes and quarters that she would like to put in her savings account. When she takes the cup to the bank, the banker tells Cynthia that the 386 coins in the cup are worth $58.10.

How many quarters does Cynthia have in her cup?
A.
126
B.
130
C.
256
D.
386

Answer 57

hi @Ggirl99

Answer 58

hi :D

Answer 59

http://openstudy.com/study#/updates/518347f3e4b09587cd3904d6
This mite help....@daiglejeremy101

Answer 60

A system of two linear equations has an infinite number of solutions. How is this possible?
A.
It's not; the graphs of the two equations can intersect only once.
B.
The two equations are the same line.
C.
The equations are parallel lines.
D.
There was an error in solving the system.