Ask your own question, for FREE!
Mathematics 7 Online
OpenStudy (sicklefirebolt):

medal and fan for the answer!

OpenStudy (sicklefirebolt):

A point Q on a segment with endpoints A (2, −1) and C (4, 2) partitions the segment in a 3:1 ratio. Find Q. You must show all work.

OpenStudy (sicklefirebolt):

it needs to be in full sentences :\

OpenStudy (solomonzelman):

You can use the midpoint formula twice (for lazies)

OpenStudy (sicklefirebolt):

@SolomonZelman wait how would you use it? sorry im confused :\

OpenStudy (solomonzelman):

\(\Large\color{blue}{ \Huge{(}\frac{\LARGE {x_1-x_2}}{2} , \frac{\LARGE {y_1-y_2}}{2} \Huge{)} }\)

OpenStudy (solomonzelman):

Once, and then the other time. You can get 2 ways to divide it.

OpenStudy (sicklefirebolt):

but the midpoint formula just tells you the points that are in the middle... im sorry im really confused haha

OpenStudy (solomonzelman):

yes, but then you can use it again, and the middle of the half segment, would be the partition of 3:1.

OpenStudy (sicklefirebolt):

oh! that makes sense! thank you so much @SolomonZelman

OpenStudy (sicklefirebolt):

would the answer be (3.5, 1.5) or (3.5, 3.5) @SolomonZelman

OpenStudy (solomonzelman):

My bad, I put - instead of plus in x1+x2 and y1+y2

OpenStudy (solomonzelman):

I see you figured though...

OpenStudy (solomonzelman):

\(\LARGE\color{blue}{ (2, −1) ~~~~~~ (4, 2) }\) \(\LARGE\color{blue}{ \Huge{(} \frac{2+4}{2}, \frac{(-1)+2}{2} \Huge{)} }\)

OpenStudy (solomonzelman):

So the middle is, ` ( 3 , 0.5 ) `

OpenStudy (solomonzelman):

And then, MIDPOINT of `(2,-1) (3,0.5) ` or MIDPOINT of `(4,2) (3,0.5) `

OpenStudy (solomonzelman):

(2.5 , -0.25) or (3.5 , 1.25)

OpenStudy (sicklefirebolt):

so it would be 3.5, 1.25 as the answer? thank you so much by the way!

OpenStudy (solomonzelman):

Yes, or (2.5 , -0.25)

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!