Question

Help! Did I simplify these equations right?
3x = 5 - 2y, 3x + 2y = 7
simplified to the below..
y = (-3/2)x + (5/2), y = (-3/2)x + 7/2
I'm trying to get these equations into a form, that I can use to put them into the graphing calculator...

Answer 1

yes

Answer 2

i have an easier way

Answer 3

an easier way for what?

Answer 4

yes if you want to graph them that is what you have to do. because to graph you need y = something

Answer 5

what you've done is ok indian

Answer 6

for solving the equation without using the calculator

Answer 7

I've graphed my simplified equations..but I'm not coming up with the answer that my online test came up with...it says I have the wrong answer...and that there is no solution, it says it's inconsistent. jit4won...my method may work, when I don't have a time limit...but when I have about 7 such problems to do, and I try to work them out on paper, using a normal calculator to figure out the values...and a 1 hour time limit plus other, different problems....I get rushed.

Answer 8

Do you have skype ?

Answer 9

Nope, wish I did. Webcams cost money, you know.

Answer 10

no cam is required

Answer 11

I don't think there's one built into the family computer here either..

Answer 12

Do you have anything to hear my voice ?

Answer 13

indianaelena, did you see what I said on the other post? about the algebraic way to solve systems?

Answer 14

jitwon, I have no microphone hooked up to the computer either. Good microphones also cost money. Uh, I don't remember seeing that, loophole..

Answer 15

you might want to go back because the way you are solving takes longer, thats why you couldnt do it on a test...

Answer 16

I've tried simplifying the equations into y=? form, so I can put them into the calculator, is that what you're talking about, loophole?

Answer 17

no, go back to your other post, i explained it

Answer 18

you dont even need a calculator

Answer 19

okay just read carefully
3x = 5 - 2y means 3x+2y= 5 ................(1)
3x + 2y = 7 ........................................(2)
you can see the ratio of coefficients of x = ratio of coefficients of y = 1 but it's not equal to the ratio of constant terms ......... which is 5/7 so it's an inconsistent system and there will be no solution

Answer 20

So I've looked at your algebraic method, loophole...I've been doing that with past problems...just thought that I could only get the right answer for these by graphing. jit4won, I don't understand your explanation...

Answer 21

I've tried to simplify the system and graph it on the graphing calculator..and it gave me a solution...

Answer 22

I must have messed up simplifying it into y=? form..

Answer 23

So if after simplifying it...the equations are the same...but both come up with different answers, then the system is considered inconsistent?

Answer 24

yes

Answer 25

ok...I'm off to get the answers that my online math quiz got...so that hopefully I'll do good on the chapter test, thanks.

Answer 26

great

Answer 27

graph of these 2 expressions have same slope but cut the y axis at 5/2 and 7/2 so they are parallel

Answer 28

yes

Answer 29

slope are same thats why they are parallel