Question

Need help with Algebra 1

Answer 1

okay

Answer 2

(a) Solve the system of equations using the method of your choice. SHOW ALL WORK.
(B) Explain why you chose that method

a+c=9
8a+4.5c=58

Answer 3

what did you do?

Answer 4

We can use the substitution method.

Answer 5

yeah you can do that

Answer 6

What is the first step?

Answer 7

our 1st equation is this-> a+c=9

so
subtract c from both sides
a+c-c=9-c
a=9-c

now you have this-> a=9-c
just put this value of a in the 2nd equation
:) then try to solve

Answer 8

so in the second equation will look like :
8(9-c)+4.5c=58

Answer 9

u are in 9 grade and in flvs

Answer 10

no hes not neither am i

Answer 11

8(9-c)+4.5c=58
8(9-c)+4.5/10c=58
\[8(-c+9)+\frac{ 3^{2} *5}{ 2*5 }\]

Answer 12

c=4?

Answer 13

yeah

Answer 14

now use this-
a=9-c

Answer 15

to get a

Answer 16

im so confused

Answer 17

lets start over

Answer 18

no wait

Answer 19

do you understand how we get c?

Answer 20

kind of

Answer 21

when i sub it in for a then I got c?

Answer 22

9-c

Answer 23

okay we just wanted to get rid of "a" from the 2nd equation so we substituted the value of a as (9-c) which we got from the 1st equation
now after we did the substitution in the 2nd equation we solved it to get c

now we have c

we just put the value of c in our 1st equation to get the value of a

Answer 24

Did i solve for c correctly?

Answer 25

well your answer is correct
c is 4
but i didn't get your method
it looks messed up

Answer 26

okay so how do I do it correctly?

Answer 27

\[8(-c+9)+\frac{ 3^{2}*5 }{ 2*5 }c=58\]

Answer 28

I just simplify that to get c=4

Answer 29

oh okay
:)
well you can see it all explained here- http://www.cymath.com/answer.php?q=8(9-c)%2B4.5c%3D58

Answer 30

Okay we have c=4 now we need a which im guessing is a=5

Answer 31

yeah thats correct

Answer 32

but how do we solve for a?

Answer 33

sub in c?

Answer 34

yeah

Answer 35

a+c=9
a+4=9
a=5

Answer 36

correct

Answer 37

Thank you pogo

Answer 38

:D npo prbl yuko

Answer 39

*np

Answer 40

was this substitution method?

Answer 41

yes it was substitution method :)