A community for students.
Here's the question you clicked on:
 0 viewing
 3 years ago
What quadrant are the equations in?
A. 3x + 2y = 15
x  4y = 20
B. 10x  y = 30
x  y = 2
C. 2x  5y = 10
x + 2y = 10
D. 3x + y = 9
7x  7y = 14
 3 years ago
What quadrant are the equations in? A. 3x + 2y = 15 x  4y = 20 B. 10x  y = 30 x  y = 2 C. 2x  5y = 10 x + 2y = 10 D. 3x + y = 9 7x  7y = 14

This Question is Closed

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1go there for some accuarate help

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4I don't have a library card #. That's not going to help me.

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1lemme know what happens

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4It worked but I don't see it helping me too much.

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1ok you shouldve pressed the math section

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1ok then you fill out the information on the bottom it shouldve let you type in your qestion

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4Would this be algebra I or II?

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1what are your choices

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4would it be graphing functions?

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4I just need to know how to graph them.

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1girl go the bottom of tha page and get a tutor a live tutor will help you out

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4I don't like that site.

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1lol ok then well their helpful i jsut uesd them rite now and they gave me the rite answer to everyting

keketsu
 3 years ago
Best ResponseYou've already chosen the best response.0Brizy, here's something else you can also try. Go to http://fooplot.com. It will graph the equations for you and you can see what quadrants they are in. You do have to solve for y first. So your first equation in A would be: 3x + 2y = 15 2y = 3x  15 y = (3/2)x  (15/2) Then you'd enter everything right of the "=" sign on that website. Hope that helps.

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1now thats coool im gonna try that

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4Yeah that seems complicated :(

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1my god girl you are hard to please

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4Lol I've herd that before :)

keketsu
 3 years ago
Best ResponseYou've already chosen the best response.0Haha. It does take some work, but that process should at least make it easier.

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1oh shadowfiend was here

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1have i metntioned you look wonderful today:)

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0BrizyBaby—the easiest way to answer these question is usually to graph them, honestly.

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4I don't know how to graph the equations....that's what I need help with.

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0Got it! Now we're at the heart of the problem :)

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0Let's start with A then. We have two equations: 3x + 2y = 15 x  4y = 20

aminah.love18
 3 years ago
Best ResponseYou've already chosen the best response.1well i give up nice meeting you thoug Brizzy

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4I need a easy way to know how to graph them.

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4You too aminah.love18

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0I find it easiest to graph equations when they're in y = mx + b (slopeintercept) form. So first things first, we try to solve the equations for y: \[\begin{align} 3x + 2y &= 15\\ 2y &= 3x  15\\ y &= \frac{3x  15}{2} = \frac{3}{2}x  \frac{15}{2} \end{align}\] And the other one: \[\begin{align} x  4y &= 20\\ 4y &= 20  x\\ y &= \frac{20  x}{4} = \frac{20}{4}  \frac{1}{4}x\\ y &= 5  \frac{1}{4}x = \frac{1}{4}x  5 \end{align}\]

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0So, we now have: y = 3/2 x  15/2 y = 1/4x  5 The first thing to notice is that both of these have a negative slope. Do you know what a negative slope means on a graph?

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4I don't get how you did the equations but yeah a negative slope goes down left to right.

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0Whoops. Sorry then, let's go back to that :) Let's start with 3x + 2y = 15. We're trying to solve for y. That means we need y alone. Remember that an equation doesn't change if we subtract the same thing from both sides. So first things first, we move the 3x to the right: 3x + 2y = 15 3x  3x + 2y = 15  3x Subtract 3x from both sides, 3x  3x is 0: 0 + 2y = 15  3x 2y = 15  3x (We leave off the 0.) Then we need to get rid of the 2. Dividing the same thing from both sides also leaves the equation unchanged, so we'll divide by 2: y = (15  3x) / 2 y = 15/2  3/2 x Does that make more sense?

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4yeah. So the points are 7.5 and 1.5?

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0Close! :) This means that the line is, like we said, going top left to bottom right. It means for every 3 units down that it goes, it goes two units to the right. And it means that it meets the y axis at 7.5. A quick, semiaccurate drawing: dw:1329863330467:dw

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4What did I get wrong?

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0So you can see here that that line is in quadrants II, III, and IV: dw:1329863470553:dw

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.01.5 isn't a point, it's the slope, that's all.

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4So, it's in the third Quadrant?

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0Well, that's what I'm not 100% clear on in the question. Obviously this line goes through three quadrants. Is the question asking which quadrant both lines are in or..?

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4Well does it mean what quadrant the slope is in?

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0Sorry > slope isn't really in a quadrant. It just tells you how the line moves from one position to another (i.e., what angle it's at).

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0It probably means what quadrant the two lines meet in, so let's look at the other line.

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0y = 1/4x  5 So we have a slope of 1/4, meaning for every one unit we go down, we move to the right 4 units. And 5 is the yintercept, which means the line meets the y axis at 5. Another rough drawing: dw:1329864223848:dw

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0If we put the two together: dw:1329864317169:dw

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0You can see there that they do in fact intersect in quadrant III.

BrizyBaby16
 3 years ago
Best ResponseYou've already chosen the best response.4So for A it's Quadrant III?

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0I would assume so. Again, the question isn't *super* clear, but I think that's what it's asking for.

shadowfiend
 3 years ago
Best ResponseYou've already chosen the best response.0Glad I could help :)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.