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Mathematics 8 Online
OpenStudy (anonymous):

I need help please. Will become fan and give a medal

OpenStudy (anonymous):

Select the coordinates of two points that are on the line x = 5. (5, 0) and (0, 5) (5, 0) and (5, -2) (5, 0) and (0, 2) (0, 5) and (0, 2)

OpenStudy (anonymous):

(5, 0) and (5, -2)

OpenStudy (anonymous):

Thank you help me with a couple more

OpenStudy (anonymous):

|dw:1407502449224:dw| This is how it would look.

OpenStudy (anonymous):

oh okay I get it now

OpenStudy (anonymous):

Cool :)

OpenStudy (anonymous):

can you help with more @iambatman and @DELKATTY69

OpenStudy (anonymous):

go on

OpenStudy (anonymous):

Write the equation of the line that is parallel to the line y = -3x + 12 and passes through the point (-1, 6). y = one thirdx + 7 y = -3x + 3 y = one thirdx + 3 y = -3x + 7 Question 3 Write the equation of the line that is perpendicular to the line y = three halvesx + 4 and passes through the point (-6, 3). y = three halvesx - 1 y = three halvesx + 3 y = -two thirdsx - 1 y = -two thirdsx + 3

OpenStudy (anonymous):

Well what do we know about parallel lines?

OpenStudy (anonymous):

ques 2 ans b

OpenStudy (anonymous):

thanks @DELKATTY69 but i know that they connect @iambatman

OpenStudy (anonymous):

They have the same slope, so what you want to do is find b, y = mx+b. Where we already have the slope m, so plug in the coordinates for (x,y) and you can solve for b. Parallel lines, NEVER CONNECT. |dw:1407502969171:dw|

OpenStudy (anonymous):

ques ans c

OpenStudy (anonymous):

okay so they have to be the same slope and they never connect do they have to be equal

OpenStudy (anonymous):

@DELKATTY69 what is your reasoning to your answers?

OpenStudy (anonymous):

No the equations will differ, plug in the following (x,y) and solve y = mx+b so you have, y=-3x+b, solve for b here.

OpenStudy (anonymous):

simple put the points on the 4 options u get ans quick and simple only one option satisy this luck

OpenStudy (anonymous):

so its c

OpenStudy (anonymous):

if you go by lenthy methords you loose time

OpenStudy (anonymous):

I just explained to you the slope with be the same, but you ignored me.

OpenStudy (anonymous):

me i didn't

OpenStudy (anonymous):

So how would you find the equation of the parallel line?

OpenStudy (anonymous):

Take your time and read over my earlier comments :)

OpenStudy (anonymous):

If two lines are parallel, they have the same slope. So knowing the slope of the parallel line is the same as knowing the slope of the line whose equation you want to write. So first you find the slope of the parallel line. Then you have the slope of the line you want and a point on the line you want, and you can use the point-slope form to describe the equation. Example: Find the equation of the line that is parallel to the line 4x - 2y = 3 and passes through the point (1, 2) First find the slope of the parallel line: 4x - 2y = 3 -2y = -4x + 3 2y = 4x - 3 y = 2x - 3/2 The slope of the parallel line is 2, which means the slope of the line you're looking for is also 2 (remember, parallel lines have the same slope) So now we know the slope of the line we're looking for and a point on that line. Using point-slope form:

OpenStudy (anonymous):

Mhm ok copy pasting won't help you very much, anyways I hope you understand what's going on here, good luck.

OpenStudy (anonymous):

well you can go by the slope method but it is a fact that the answer line should pass through the given point.so why not utilize it

OpenStudy (anonymous):

thank you @DELKATTY69 can you help me with more

OpenStudy (anonymous):

go on

OpenStudy (anonymous):

Select the equation of a line that is perpendicular to the line on the graph and passes through the point (-1, 2). y = 2x + 4 y = - 2x + 2 y = - 1 over 2 x + 2 y = 2x - 1 Question 6 Write the equation of the line that is parallel to the line 4x - 3y = -12 and passes through the point (-3, 4). y = four thirds x + 8 y = four thirds x + 3 y = -three fourths x + 8 y = -three fourths x + 3 Question 7 Is the line for the equation y = 1 horizontal or vertical? What is the slope of this line? Select the best answer. The line is horizontal. The slope is 0. The line is horizontal. The slope is 1. The line is vertical. The slope is undefined. The line is vertical. The slope is 0.

OpenStudy (anonymous):

Haha!

OpenStudy (anonymous):

Do you need help more on these questions??

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

They are very very easy. so why you don't try yourself?

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