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Mathematics 18 Online
OpenStudy (anonymous):

Which type of triangle is RST? a. equilateral b. isosceles c. scalene d. right 9. Write an equation of the line that contains the median of traingle RST from S to RT . a. x + 2 y = -10 b. x + 2 y = 6 c. x + 2 y = 8 d. x + 2 y = 10 10. Write the equation of the line that contains the altitude of triangle RST from T to RS . a. 2x - 3y = -13 b. 3 x -2 y = -2 c. 2 x + 3 y = 29 d. 3 x + 2 y = 26

OpenStudy (anonymous):

OpenStudy (anonymous):

determine the length of sides by pythagoras formula. I think its isoceles as two of its sides are same.

OpenStudy (anonymous):

I order to do 9,you have to first determine the midpoint.Find midpoint and tell me the answer.

OpenStudy (anonymous):

@mhumzatariq its -2,4

OpenStudy (anonymous):

You need to determine the midpoint of RT.

OpenStudy (anonymous):

Oh Well in that case its 2,4

OpenStudy (anonymous):

yes.can you determine the gradient of line containing midpoint of R and T, and S?

OpenStudy (anonymous):

What I dont follow?

OpenStudy (anonymous):

In order to find the median we need its slope,right?

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

Do you know how to determine it?

OpenStudy (anonymous):

I got 1.5

OpenStudy (anonymous):

Let the midpoint of R and T be M, Is 1.5 the slope of line containing M and S?

OpenStudy (anonymous):

I think its -1.5

OpenStudy (anonymous):

No.

OpenStudy (anonymous):

The slope of S and M is 2/3.

OpenStudy (anonymous):

sorry.-2/3

OpenStudy (anonymous):

Oh yeah because its the recipricol or something

OpenStudy (anonymous):

yes.you got it!

OpenStudy (anonymous):

As SM is perpendicular to RT,we need to take the negative recipocal.

OpenStudy (anonymous):

As we need to determine the equation in form of y=mx+c and we have m,just put S into the equation to find c.tell me the answer.

OpenStudy (anonymous):

So would it look like 7=(3/2)(-4+b)?

OpenStudy (anonymous):

The equation anyway?

OpenStudy (anonymous):

7=(-3/2)(-4+b)?

OpenStudy (anonymous):

its 7=(-2/3)(-4)+c

OpenStudy (anonymous):

Sorry I put it inversed

OpenStudy (anonymous):

I got 2x+3y=13. Are you sure the you have not flipped anything between question 9 and 10?

OpenStudy (anonymous):

What was the answer for nine again?I missed it.

OpenStudy (anonymous):

2x+3y=13

OpenStudy (anonymous):

I think thats ten. Because the options for ten are: a. 2x - 3y = -13 b. 3 x -2 y = -2 c. 2 x + 3 y = 29 d. 3 x + 2 y = 26

OpenStudy (anonymous):

I think ten would be A

OpenStudy (anonymous):

Because the options for number nine are: a. x + 2 y = -10 b. x + 2 y = 6 c. x + 2 y = 8 d. x + 2 y = 10

OpenStudy (anonymous):

ok.but I think you have flip the question the question of 9 as it fits in the options of ten.

OpenStudy (anonymous):

So what would 'ten" be?

OpenStudy (anonymous):

I think I have confused you.I am just saying that below is right: 9. Write an equation of the line that contains the median of traingle RST from S to RT . a. 2x - 3y = -13 b. 3 x -2 y = -2 c. 2 x + 3 y = 29 d. 3 x + 2 y = 26 10. Write the equation of the line that contains the altitude of triangle RST from T to RS a. x + 2 y = -10 b. x + 2 y = 6 c. x + 2 y = 8 d. x + 2 y = 10

OpenStudy (anonymous):

In order to do 10,repeat the same procedure and you will surely arrive at answer.

OpenStudy (anonymous):

Alright thanks for the help.

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