Mathematics
8 Online
OpenStudy (anonymous):
Solve for x in the proportion .
x = 8 and x = −8
x = 8 and x = −15
x = −8
x = −3 and x = −5
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (uri):
Question?
OpenStudy (uri):
wut.
OpenStudy (uri):
wot.
thomaster (thomaster):
You need to solve for x but you didn't post the problem
OpenStudy (austinl):
There has to be more to the question, or you are trolling us.....
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (uri):
Well there is no question just answer choices..
OpenStudy (anonymous):
the question is 2x/16x+30=-1/x
OpenStudy (austinl):
\[\frac{2x}{16x+30}=-\frac{1}{x}\]
Is this correct?
OpenStudy (anonymous):
yes
OpenStudy (austinl):
I would cross multiply first.
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
alright .
OpenStudy (anonymous):
i got 2x^2=-16x-30. that is right so far right
OpenStudy (austinl):
Yep.
OpenStudy (austinl):
Then move the right side over to the left side.
OpenStudy (anonymous):
so it would be 2x^2+16x+30 right?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (austinl):
Right! Then you would factor that.
OpenStudy (anonymous):
so i would factor out a GCF so that it becomes smaller?
OpenStudy (austinl):
Indeed!
OpenStudy (anonymous):
the GCF is 2 so then i would get x^2+8x+15=x
OpenStudy (austinl):
Right, so what would the factor be?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
2?
OpenStudy (austinl):
No, I mean, factor it out.
a(x+b)(x+c)
a=2 right? so what are b and c?
OpenStudy (anonymous):
oh
OpenStudy (austinl):
No. What times what is 15, but when added is 8?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
3 and 5
OpenStudy (austinl):
Correct. There you go... However, I believe we made an error somewhere. It should be -3 and -5.
OpenStudy (anonymous):
ya i was about to say that because there are no answers that say 3 and 5
OpenStudy (anonymous):
thank you austinL!!! ^_^
OpenStudy (austinl):
No problem.