Mathematics
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OpenStudy (anonymous):
If f(x) = |x – 5| + 2, find f(3)
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OpenStudy (anonymous):
what's |3-5| = ?
OpenStudy (anonymous):
-2
OpenStudy (anonymous):
no
OpenStudy (anonymous):
absolute value of -2 = ?
OpenStudy (anonymous):
2
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OpenStudy (anonymous):
add 2 to that = ?
OpenStudy (anonymous):
0?
OpenStudy (anonymous):
why 2+2 = 0
OpenStudy (anonymous):
add 2 to 2
OpenStudy (anonymous):
oh 4
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OpenStudy (anonymous):
thats ur answer
do u understand absolute values |...| ?
OpenStudy (anonymous):
they always generate a positive value, never a negative, ok?
OpenStudy (anonymous):
alright, thanks. do you know how to do these?
What is the turning point of the graph of f(x) = |x + 3| – 2? /:
OpenStudy (anonymous):
|dw:1401096096361:dw|
will be something to the above, you need to find where it turns
OpenStudy (anonymous):
how do you find that?
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OpenStudy (anonymous):
when f(x) = 0, what's x
and where is the y intercept?
OpenStudy (anonymous):
-3 is x and y is -2?
OpenStudy (anonymous):
or... 3 and 2?
OpenStudy (anonymous):
f(x) = 0
|x+3|-2 = 0
|x+3| = 2
x = -1, because -1+3 = 2
and x = -5 because -5+3 = -2 but we have absolute value around it so answer = 2
OpenStudy (anonymous):
okay,so is the answer (2,-3) or (-3,2)?
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OpenStudy (anonymous):
to find the u intercept, put x = 0, what f(x)
OpenStudy (anonymous):
sorry Y not u
OpenStudy (anonymous):
so it's (2, -3)?
OpenStudy (anonymous):
y intercept is 1
OpenStudy (anonymous):
well 1 isn't an answer choice so......
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OpenStudy (anonymous):
no I know ... we found the y intercept only
OpenStudy (anonymous):
ok cool i have to turn this in in 8 minutes sooooooo what do i do now.
OpenStudy (anonymous):
i know it's 2, -3 or -3, 2 so which order.
OpenStudy (anonymous):
-3,2 then
OpenStudy (anonymous):
ok thanks
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OpenStudy (anonymous):
what answers do you have, all options? is it multiple choice
OpenStudy (dan815):
for absolute values u are always taking the magnitude, if its a negative number u still take it as a positive number
OpenStudy (anonymous):
best if you post the second question as a standalone question so others can help too
OpenStudy (anonymous):
is there an answer of -3,-2 ?
OpenStudy (anonymous):
|dw:1401097453898:dw|