A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Hi all. I have 4 problems that I am having a very hard time with so need some help please. Solve the system of equations by graphing: 7x5y=15 & 7x=5y+15. Need solution set (ordered pair)
anonymous
 5 years ago
Hi all. I have 4 problems that I am having a very hard time with so need some help please. Solve the system of equations by graphing: 7x5y=15 & 7x=5y+15. Need solution set (ordered pair)

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0do you know how to plot graphs?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I need feedback to help you.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorry had to step away. I have a hard time with graphing.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay. graphs have a dependent variable and an independent variable. The x axis represents the independent variable and the y axis represents the independent variable.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so, now choose any values of x for your equation 7x  5y = 15. That is, choose any values of x and you will get a corresponding dependent value of y.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you said the x and y both represent the independent.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorry, y represents the dependent variable.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0let me give you an example. suppose you are a salesman. Your year end bonus is 10% of sales you make that year. So, the sales you make is an independent variable. You can make 10000 dollars worth of sales, or if you are better than average, you make 20000 dollars of sales. Or if you are brilliant, you make $100,000 of sales. But notice what happens. The bonus is 10% of your sales. So the more sales you make, the more bonus you get. In other words, the bonus is dependent on sales.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0unfortunately all dependent variables are not so easily represented as 10% of the independent variables. suppose your bonus was 10% of sales  medicare  1/2taxes

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0then your equation would be bonus = sales/10M1/2tax

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0anyway, the point is, there are independent variables which are in your hand.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and there are other variables which depend on your independent variable.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so in your equation, 7x  5y = 15, let say x is the independent variable, just because it is nice to have the x variable on the independent axis (xaxis)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so then, what is the dependent variable, in terms of x?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if bonus is 10% of sales, express bonus in terms of sales. similarly if 7x5y is 15, express y in terms of x.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0basically, you are trying to express the dependent variable as a function of the independent variable.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you could say that 7x5y = 15 is " 7 times your sales minus 5 times your bonus always gives 15 grand"

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so express bonus in english, or in an equation.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0are you getting what I am saying?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorry that is one area I just seem can' get a grasp on

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay if 7 times sales minus 5 times bonus is always 15 grand, then 7 times sales minus 15 grand divided by 5 is the bonus. in other words, y = (7x15)/5

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so choose your x values and find out the corresponding y values.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0since this is the equation for a line, you need only two points.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok so here is what I did. tell me if I am rght

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I chose 2 for x. y=7(2)15/5.... y=1415/5.... y=1/5

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but 1/5 is kinda hard to plot on a graph.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yes very true. do I need to choose a different number or x?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0notice that y i some value/5. so if the value is a multiple of 5, then you would get a nice round number for y.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so suppose you chose x = 5. 7 times 5 is 35, and 3515 is 20. 20 is a multiple of 5. so y =4.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so one value could be (5,4)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok I changed the value of x to 5. I came up with y= 3

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0both are nice round numbers, easy to plot on a pice of graph paper.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0how did you come up with y = 3 for x = 5?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorry fiured wrong. redid it and got 4.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay, next choose x =10

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay great! so you have two points (5,4) and (10,11). there is only one line which passes through both points. So you have your first line down on the graph! huzzah! one down, one equation to go.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so what is the second equation?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0this is the same equation as before.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the other one was 7x5y=15

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay, subtract 5y from both sides of your second equation and post what you got.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0how did you get that? http://www.dabbleboard.com/draw?b=Guest644716&i=0&c=3327a9e1158d904a38fbad735c24ed28cad7bcd9 show me there.
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.