OpenStudy (anonymous):

8. The curve y^2=12x intersects the line 3y=4x+6 at two points. Find the distance between the two points. I got the wrong answer and I don't know why! Please help!

2 years ago
OpenStudy (anonymous):
2 years ago

OpenStudy (mehek14):

I just graphed both lines and they intersect at (0.75, 3) and (3,6)

2 years ago
OpenStudy (anonymous):

Ok, I assumed that I wasn't allowed to graph anything but is that wrong then?

2 years ago
OpenStudy (mehek14):

well you got 2 different points

2 years ago
OpenStudy (mehek14):

\(\large{\bf{\sqrt{(3-0.75)^2+(6-3)^2}}}\)

2 years ago
OpenStudy (anonymous):

Yeah but if I could just graph to get the two points it would probably be easier since I went so wrong with my calculations. So what I mean is, if I graphed to get those two points that would be allowed?

2 years ago
OpenStudy (mehek14):

does it say in your instructions if you can or not?

2 years ago
OpenStudy (anonymous):

not specifically. in the examples they give you before the questions, some of them say 'first draw a graph' but then they calculate it anyway

2 years ago
OpenStudy (mehek14):

so yea I got the graph for you

2 years ago
OpenStudy (anonymous):

Ok, that will be easier then. I just used the points you got and tried getting the length but I got the wrong answer? I got -3.94 instead of the correct answer which is 3.75

2 years ago
OpenStudy (anonymous):

Oh nevermind I think I see where I went wrong, let me try again quick

2 years ago
OpenStudy (mehek14):

how'd you get -3.94?

2 years ago
OpenStudy (anonymous):

Oh apparently I changed one of the signs by accident. Whoops. I am getting the right thing now though. Sorry for all the trouble and thanks very much for your help!

2 years ago
OpenStudy (mehek14):

yw ^_^

2 years ago