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Mathematics 8 Online
OpenStudy (anonymous):

Help http://prntscr.com/zperk

jimthompson5910 (jim_thompson5910):

What is the perimeter of the first triangle

jimthompson5910 (jim_thompson5910):

any ideas?

OpenStudy (anonymous):

yea a+b+c =P

jimthompson5910 (jim_thompson5910):

ok so the first triangle has a perimeter of ____

OpenStudy (anonymous):

so 17 ror tri 1

OpenStudy (anonymous):

for tri two 22

OpenStudy (anonymous):

for tri three 27

jimthompson5910 (jim_thompson5910):

all 3 are correct, nice work

OpenStudy (anonymous):

but we have to state some relation ship too

jimthompson5910 (jim_thompson5910):

ok let me think on that for a sec

jimthompson5910 (jim_thompson5910):

the first term is 17 the second term is 22 the third term is 27

jimthompson5910 (jim_thompson5910):

to get the next term, you're adding 5 so this is an arithmetic sequence

OpenStudy (anonymous):

http://prntscr.com/zpfvl

jimthompson5910 (jim_thompson5910):

Hint: |x-5| >= 3 turns into x-5 >= 3 or x-5 <= 3

OpenStudy (anonymous):

x-5≥3 and x-5≤-3 x-5+3≥3+3 and x-5+3≤-3+3 x≥6 and x≤0 therefore,x≥6 and x≤0

jimthompson5910 (jim_thompson5910):

oh you got it already lol

jimthompson5910 (jim_thompson5910):

sorta

OpenStudy (anonymous):

i gave her this answer she said my equation seup is not correct

jimthompson5910 (jim_thompson5910):

sry made a typo above, but fixed it x-5 >= 3 or x-5 <= -3 x >= 3+5 or x <= -3+5 x >= 8 or x <= 2

OpenStudy (anonymous):

ok but do we have to write ≥ instead of >

jimthompson5910 (jim_thompson5910):

turn every >= into ≥ turn every <= into ≤

OpenStudy (anonymous):

i got it

jimthompson5910 (jim_thompson5910):

ok great

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