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Mathematics 15 Online
OpenStudy (biohazard9064):

Help Me Please

OpenStudy (biohazard9064):

I need help with 2 and 3 2.The inequalities: Show the work for finding the inequality that defines each segment. 3.A point: Choose a point within the boundaries of the shape, and show algebraically that the point satisfies all of the inequalities

OpenStudy (biohazard9064):

Idk for sure

OpenStudy (biohazard9064):

@mathstudent55 @welshfella can you help me?

OpenStudy (biohazard9064):

this sucks xD none can help me

OpenStudy (biohazard9064):

ok @Keigh2015 can you help at all?

OpenStudy (keigh2015):

Sorry man I can't help

OpenStudy (biohazard9064):

ok

OpenStudy (welshfella):

First find the equations for each of the lines

OpenStudy (welshfella):

eg The line joining (4,8) and (9,13) is y = x + 4

OpenStudy (biohazard9064):

how did you get that?

OpenStudy (welshfella):

and area under that is y > x + 4

OpenStudy (biohazard9064):

y > x + 4 is 4,8 to 9,3?

OpenStudy (welshfella):

first find the slope y2 - y1 ------ = (13 - 8) / (9-4) = 1 x2 - x1 Then plug this and one of the points into the general equation y - y1 = m(x - x1) y - 13 = 1(x - 9) which simplifies to y = x + 4

OpenStudy (welshfella):

now you need to do that for the other 3 lines

OpenStudy (welshfella):

no (4,8) to (9,13)

OpenStudy (biohazard9064):

ok so

OpenStudy (biohazard9064):

So if (4,8) to (9,13) is y = x + 4

OpenStudy (biohazard9064):

Then y2 - y1 ------ = (4 - 8) / (9 - 3) = ? x2 - x1

OpenStudy (biohazard9064):

How would I solve that @welshfella

OpenStudy (anonymous):

4-9 and -8+3

OpenStudy (biohazard9064):

ok 4-9 is 5 and -8+3 is -5

OpenStudy (anonymous):

no 9-4 and -3+ 8 I believe I mixed them up

OpenStudy (biohazard9064):

thats 5 and 5

OpenStudy (biohazard9064):

so 10?

OpenStudy (anonymous):

I swear I'm wrong just ask welsh..xD

OpenStudy (welshfella):

no this line has negative slope and is at right angles to the one joining (4,8) and (9,13) so its slope is -1 y-y1 = m(x - x1) y - 8 = -1(x - 4) y = -x + 4 + 8 y = -x + 12

OpenStudy (biohazard9064):

wow i cant believe it im so lost rn

OpenStudy (biohazard9064):

is that for 9,3 or 9,13?

OpenStudy (welshfella):

that is the equation for the line joining (4,8) and )9,3)

OpenStudy (welshfella):

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OpenStudy (welshfella):

there are the slopes of the four lines

OpenStudy (anonymous):

wow I just got ignored..:O..well then..bye

OpenStudy (welshfella):

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