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Mathematics 16 Online
undeadknight26 (undeadknight26):

Help again...

undeadknight26 (undeadknight26):

A school system is reducing the amount of dumpster loads of trash removed each week. In week 5, there were 60 dumpster loads of waste removed. In week 10, there were 40 dumpster loads removed. Assume that the reduction in the amount of waste each week is linear. Write an equation in function form to show the amount of trash removed each week. f(x) = - 4x + 60 f(x) = 4x + 60 f(x) = - 4x + 80 f(x) = 4x + 80 Its not the first one but im thinkit is the first second on.

OpenStudy (idku):

first find how many were removed in 5 weeks, (from 5th to 10th week)

undeadknight26 (undeadknight26):

20?

OpenStudy (mertsj):

You have two ordered pairs: (5,60) and (10,40) Use them to find the equation.

undeadknight26 (undeadknight26):

i tried that and it resulted into the first one...but the first one was wrong...

undeadknight26 (undeadknight26):

cause it is 20/-5

undeadknight26 (undeadknight26):

which is -4 right?

OpenStudy (mertsj):

\[m=\frac{60-40}{5-10}= -4\] \[y-60=-4(x-5)\] \[y-60=-4x+20\] \[y=-4x+80\]

undeadknight26 (undeadknight26):

dang that is amazing...

OpenStudy (mertsj):

No. It is mathematics.

undeadknight26 (undeadknight26):

so the last one?

OpenStudy (mertsj):

If the last one says f(x)=-4x+80 then it is the last one. Otherwise not.

undeadknight26 (undeadknight26):

lol ok thank you:D

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