Help Me Please

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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
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Idk for sure
@mathstudent55 @welshfella can you help me?

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Other answers:

this sucks xD none can help me
ok @Keigh2015 can you help at all?
Sorry man I can't help
ok
First find the equations for each of the lines
eg The line joining (4,8) and (9,13) is y = x + 4
how did you get that?
and area under that is y > x + 4
y > x + 4 is 4,8 to 9,3?
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
now you need to do that for the other 3 lines
no (4,8) to (9,13)
ok so
So if (4,8) to (9,13) is y = x + 4
Then y2 - y1 ------ = (4 - 8) / (9 - 3) = ? x2 - x1
How would I solve that @welshfella
4-9 and -8+3
ok 4-9 is 5 and -8+3 is -5
no 9-4 and -3+ 8 I believe I mixed them up
thats 5 and 5
so 10?
I swear I'm wrong just ask welsh..xD
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
wow i cant believe it im so lost rn
is that for 9,3 or 9,13?
that is the equation for the line joining (4,8) and )9,3)
|dw:1440009717505:dw|
there are the slopes of the four lines
wow I just got ignored..:O..well then..bye
|dw:1440009783646:dw|
so for 9,13 to 14,8 is the same then?
sorry - i'm ok in English - not brilliant
so from 9,13 to 14,8 it would be y = -x + ?
yes but you'll need to plug in one of the points - use (9,13)
ok so it would look like
y - y1 = -1(x - x1) y1 = 13 x1 = 9
you have to always that general form y-y1 = m(x - x1)
ok so then it would look like this? y = -x + 9
no
y - 13 = -1(x - 9) now isolate y and simplify the RHS
y - 13 = -x + 9 now add 13 to both sides
13 and 13 so that would be y= - x + 22?
yes
ok so that would be 9,13 to 14,8
we've just done that one
I know
lets see what we've got so far y = x+ 4 y = -x _ 12 y = -x + 22 oh we haven't done (9,30 to (14,8)
yep
I dont know how to start it
I 'll have to look the stuff over again I'm not sure if i'm right. Give me a minute
ok
yea the 3 we've done are ok thats y = -x + 12 though for the line from (9,3) to (14,8) slope = 1 take the point (9 ,3) y - 3 = x - 9 y = x - 6
ok
so theres the equation for 4 lines y = x+ 4 y = -x + 12 y = x - 6 y = -x + 22
thanks so much
yw so the inequalities are y <= x + 4 y >= -x + 12 y >= x - 6 y <= -x + 22 that defines the shaded diamond
gotta go
ok thanks so much

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