Question

Use the Substitution Method to solve the following system of equations.
x - 4y = 1
2x - 9y = 3

(-1, -3)

(-3, 1)

(3, 1)

(-3, -1)

Answer 1

hang on!

Answer 2

https://www.youtube.com/watch?v=6FmWAvyTYBA&feature=endscreen&NR=1 this may help

Answer 3

you have x - 4y = 1, which is the same as x = 4y +1

now substitute on the other equation the x for 4y+1 and find value of y

Answer 4

I got this guys! lol

Answer 5

or use elimination...its so much easier..lol

Answer 6

y=-1
plug that in to an original equation:)
do I need to explain how I got y?

Answer 7

(3, 1)

Answer 8

?

Answer 9

I think so let me check

Answer 10

-3

Answer 11

but yeah u got this!

Answer 12

6.01] Select the system of equations that corresponds to the given graph.

A coordinate plane shows two lines on the graph. One line crosses the y axis at (0, 2) and passes through the point (2,1). The other line crosses the y axis at (0,-2) and passes through the point (2,-1).

-2x - y = 4
2x + y = -2


-8x + 4y = -16
-4x + 2y = -8


x + 2y = 4
2x - 4y = 8


2x + 3y = 6
3x + 2y = 4



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Answer 13

bleh..this might take a while:)
but in reality u really could plug in those points for each equation...

Answer 14

it takes time but it works:)
make sure it works for BOTH equations...

Answer 15

I could do this if I wasn't doing psychology too:P
I have 4 days to finish like 7 units...BLEH!!!

Answer 16

well that helps! I think ur answer is where the lines cross...

Answer 17

haha a little late on the graph thing!
lol

Answer 18

computer was being stuped

Answer 19

oh yeah that happens...lol

Answer 20

x + 2y = 4
2x - 4y = 8

Answer 21

ummm hang on!
I got this

Answer 22

its infinitely many...