Question

For a metal :) and appreciated help!



Which of the following points lie in the solution set to the following system of inequalities?

y > -3x + 3
y > x + 2

(2, -5)

(-2, 5)

(2, 5)

(-2, -5)

Answer 1

@E.ali please don't provide answers..it is against the CoC, let @hartnn do his magic here :P

Answer 2

you can check by plugging in each point....
like if you had to check, 2,3 in y > x+7
you would take y=3 and x= 2 and plug it in y >x+7
so, 3 > 2+7 ----> 3>9 is false, so point 2,3 does NOT lie in the solution set

Answer 3

you can also solve this system of equations using elimination or substituion. I suggest elimination for this one

y>-3x+3
y>x+2

these become...
y>-3x+3
y>3x+6

Answer 4

Its just soo confusing to me. I'm new at this type of algebra.

Answer 5

Okay, in that case I believe it may be helpful to use elimination. DO you know what that is?

Answer 6

Sort of, But not fluently. I really need just a good explanation.

Answer 7

so you can multiply the equation by a figure that you want to "eliminate" in the other equation (I multiplied by 3 because 3x can eliminate -3x). So I multiplied everyting by 3, getting an equation of y=3x+6. Do you know how to solve from there?

Answer 8

I guess i can figure it out from here. Thanks for the help.

Answer 9

hey no problem :) but would you mind showing me how you would go about solving this so I can know if you understand or not? if you don't mind, I just want you to have a good idea on how to solve these types of problems so you can do them on your own in the future!

Answer 10

So how would you solve when your problem looks like this:

y>-3x+3
y>3x+6

Answer 11

hold on

Answer 12

take your time :)

Answer 13

3y on the bottom .....

Answer 14

This isn't my type of algebra. I give up. I appreciate you trying to help.

Answer 15

y > -3x + 3
y > x + 2


y > -3x + 3
3y > 3x + 6

Answer 16

oh yeah lol :P sorry XD i said that in my explanation but then.. i completely neglected to type the 3

Answer 17

the "dbl chk" method is the simplest to use on a multiple choice assignment.

Answer 18

Never heard of that.

Answer 19

whenever you obtain a solution from some process, the last step is to double check to see if it is correct

Answer 20

you do that by plugging the values you get back into the original equation ....

Answer 21

Oh double check method. i see.

Answer 22

Hey friends !!!
It is not so hard .
It is very easy !!!
You just should take numbers on x , y , and ... .
!!!!
and you have a easy problem!

Answer 23

huh i never solved it that way before... seems really effecient and wow i learned something new today! :)

Answer 24

I still don't get it....

Answer 25

spose im solving for this:

x + 3 = 9 , but in my haste i make a mistake and come to x=-6. To determine if there is an error or not, I dbl chk it:

-6+3 = 9 is false, so that means I would have made some error along the way :)

Answer 26

@shaytay :!
ask my questions !
Ok ?!

Answer 27

spose I came to the end of my work and had:

y > -3x + 3
y > x + 2

(-2, -5) as a solution; did I make a mistake? lets double check it.

-5 > -3(-2) + 3
-5 > (-2) + 2

is either one of these false? if so, then that has to be a wrong solution.
If they are both true, then it has to be a good solution.

Answer 28

I don't understand any of this.. Nothing.. I really need the answer and an explanation on how you got that answer for me to get it. I'm new at this so i don't know what you guys are talking about. I never heard of the elimination method or any of this. I really appreciate you guys trying to make me understand. But i can't answer any of the questions you are asking me, its making me feel bad.

Answer 29

Our rules prevent us from just doing all the work for you. We need you to participate in the solution process ... even if you answer our questions incorrectly, we can then at least have some idea how to proceed is all.

Answer 30

Then i guess i can't get the help i need on here. Thanks anyways.

Answer 31

good luck