Question

At what point do the lines represented by the equations 2x + y = 3 and -3 x - y =-7 intersect? I just want to know how to do this. So please show me how to do this.

Answer 1

Add the equations to get

2x + y = 3
-3 x - y = -7
------------
-1x + 0y = -4


so

-x = -4

x = ???

Answer 2

what do you get when you solve for x

Answer 3

Where did you get the 0 from>

Answer 4

y + (-y) adds to 0y

Answer 5

so the y terms cancel out

Answer 6

ok makes more sense now. I just realized that I just forgot all about that negative sign next to the seven. That's why I kept getting wrong answer. Thank you though. You were helpful ^.^

Answer 7

yw

Answer 8

Wait

Answer 9

hmm

Answer 10

whats up

Answer 11

Can you help me on this 2x^2 + 10x+12. It is asking which of the following is not a factor.
A (x+2) B(x+4) C(x+3) D2 and another one. her
Which equation represents a line that is perpendicular to y=-2/3x +5 and passes through the point (2,7)

Answer 12

2x^2 + 10x+12

2(x^2 + 5x+6)

how does it factor further?

Answer 13

What you mean. I don't really get how to do that problem. :P

Answer 14

what 2 numbers multiply to 6 AND add to 5

Answer 15

2?

Answer 16

2 and what else

Answer 17

3?

Answer 18

2 and 3, good

Answer 19

2+3 = 5
2*3 = 6

Answer 20

so x^2 + 5x + 6 factors to (x+2)(x+3)

Answer 21

n then the one that is nota factor is b then (X+4)

Answer 22

good, x+4 is the only one that doesn't fit

Answer 23

okie dokie thank u

Answer 24

np

Answer 25

Which equation represents a line that is perpendicular to y=-2/3x +5 and passes through the point (2,7) For this one I got y = 3/2x+4

Answer 26

you got it correct

Answer 27

How do you know it was correct instantly did you plug in the numbers or something

Answer 28

SOrry I also a lot of other questions I have to ask for my math homework since I have a test tomorrow :P

Answer 29

I have to ask u questions for my math test :P

Answer 30

I plugged x = 2 into y = (3/2)x+4 and got y = 7

Answer 31

yes I'm using a calculator to help me speed things up

Answer 32

ok then XD ^.^

Answer 33

hm I thought you were suppose to plug into the original problem that had the negative next to -2/3

Answer 34

no, you want to focus on the possible answer

Answer 35

ok

Answer 36

I have another one what is the y-intercept of the graph of -2x +3y=-6

Answer 37

Multiple choices A 2 B -2 C 3 D -3

Answer 38

plug in x = 0 and solve for y

Answer 39

ohh I kinda remember this one now

Answer 40

ok what do you get

Answer 41

wouldn't you get -2?

Answer 42

you would

Answer 43

nice work

Answer 44

Ok have another one which of the following best represents the inequality y > 5/3 x -1
-

Answer 45

There was suppose to be a dash line under this >

Answer 46

they want you to graph this?

Answer 47

Yes

Answer 48

ok you'll have to graph y = 5/3x - 1 first

Answer 49

do you know how to do this?