What equation is solved by the graphed systems of equations?

[angustheboss]

What equation is solved by the graphed systems of equations?

(graph attached)


answer options:
3x + 4 = 5x - 10
3x - 4 = 5x - 10
3x + 4 = 5x + 10
3x - 4 = 5x + 10

 

[Deleted member 4993]

What equation is solved by the graphed systems of equations?View attachment 3256

(graph attached)


answer options:
3x + 4 = 5x - 10
3x - 4 = 5x - 10
3x + 4 = 5x + 10
3x - 4 = 5x + 10

Like your previous problems:

Check the intercepts

Check the slopes

Please share your work with us .

If you are stuck at the beginning tell us and we'll start with the definitions e.g. define angles of depression.

You need to read the rules of this forum. Please read the post titled "Read before Posting" at the following URL:

http://www.freemathhelp.com/forum/th...217#post322217

 

[angustheboss]

reply

My main problem is that i don't really know where to start.

 

[HallsofIvy]

If you honestly do not have the slightest idea how to start- don't know how to find the equation of a straight line or how the points on a graph are related to its equation, then you need much more help than we can provide. Talk to your teacher about this!

 

[JeffM]

What equation is solved by the graphed systems of equations?View attachment 3256

(graph attached)


answer options:
3x + 4 = 5x - 10
3x - 4 = 5x - 10
3x + 4 = 5x + 10
3x - 4 = 5x + 10

No wonder you are confused: this problem makes little sense.

The given system has one solution, namely the point (7, 25).

What is the equation of a specific point? Trick question: an infinite number of equations include a specific point.

So what this question is really asking is this:

Which of equations a, b, c, or d contains the point (7, 25).

All this razzmatazz about systems of equations is just stuff to scramble your brain.

 

[angustheboss]

So what do i do first?

 

[stapel]

So what do i do first?

Do you know how to plot points? How to graph linear functions? What "slope" is? How to find line equations from their graphs? How to evaluate expressions?

As has been pointed out, we cannot provide the weeks or months of (apparently) missing background material. But if you'd like to attempt self-study, we can try to find some online lessons that may help you get started. However, it would useful to have some idea how far back the lessons should start. So please be specific. Thank you!

 

[JeffM]

So what do i do first?

You put the indicated values of x and y, namely 7 and 25, into the given equations to see which one is true. This turns out to be rather simple in this particular problem because the given equations do not even mention y.

 

[Bob Brown MSEE]

This is the problem statement

	Graph#1	Graph#2
Choice#1	3x + 4	5x - 10
Choice#2	3x - 4	5x - 10
Choice#3	3x + 4	5x + 10
Choice#4	3x - 4	5x + 10

What if x=0?

	Graph#1	Graph#2
Choice#1	+ 4	- 10
Choice#1	- 4	- 10
Choice#1	+ 4	+ 10
Choice#1	- 4	+ 10

Look on graph where x=0