Question

5x+5y=1
25x+ky=4
solve for k

Answer 1

there is few ways of working this out. Elimination, Substitution and maybe multiplication

Answer 2

which way do you prefer?

Answer 3

i need my mind refreshed. whichever method works best is the method i choose.

Answer 4

ill use substitution then :P
x = \[x = y - \frac{ 1 }{ 5 }\]
25x + ky = 4

Answer 5

25(y - \[25(y - \frac{ 1 }{ 5 }) + ky = 4\]

Answer 6

\[25y - 5 + ky = 4\]

Answer 7

do you get it now?

Answer 8

howd u get y-(1/5)?

Answer 9

divide everything in the first equation by 5

Answer 10

there is no solution :)

Answer 11

ill use elimination now

Answer 12

times the first equation by -5
-25x - 25y = -5
25x + ky = 4

Answer 13

now add this equation vertically together.
it would give you k=25

Answer 14

i probably shoulda phrased the question the way they have it on my hw.
it says:
Determine the value of k for which the system of linear equations has no solutions.

Answer 15

haha great :/
u say that now

Answer 16

you know why there is no solution?
if you sub K = 25 it wont work

Answer 17

:(

Answer 18

yes?

Answer 19

because they equal different things

Answer 20

\[\Huge{\color{Purple}{\\{\

\boxed{\mathbb{\text{}{}}{\color{green}{\color{blue}T{\color{purple}h{\color{pink}a{\color{red}nk}}}}}}}}} \]
\[\Huge{\color{Purple}{\\{\

\boxed{\mathbb{\text{}{}}{\color{blue}Y{\color{green}o{\color{red}u}}}}}}} \]

Answer 21

haha no, THANK YOU ! :)

Answer 22

ok i have another one lol
this one wants the k to have an infinite amount of solutions

Answer 23

49x-49y=49
7x+ky=7

Answer 24

the answer is not 1,7,49,1/7, or 1/49.

Answer 25

@Kuoministers

Answer 26

sorry been bit busy

Answer 27

so do you have an idea where to start?

Answer 28

i would times the 2nd equation by 7

Answer 29

ok...

Answer 30

do you undertand this yet lol?

Answer 31

49x-49y=49
7x+ky=7

49x-49y=49
49x + 7ky = 49

Answer 32

dont know where to go from there

Answer 33

-49y - 7ky = 0
-7y(7 + k) = 0

Answer 34

how do we get the k from that

Answer 35

im bit confused :P
you sure their is more than 1 answer??

Answer 36

its 1 answer

Answer 37

oh u said
this one wants the k to have an infinite amount of solutions

Answer 38

1 K but infinite solutions
we need the K

Answer 39

y(7 + k ) = 0
from this can you find K?
im pretty sure you can :P

Answer 40

hint: you only need to look at this question to get K

Answer 41

ok its -7 lol

Answer 42

im feeling slooow ha

Answer 43

ok i g2g now :)

Answer 44

have fun with your maths

Answer 45

haha see ya.