Mathematics
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OpenStudy (cheesecakekitten):
f(x) = |x + 7|
Evaluate f(-12)
A. -19
B.-5
C. 5
D. 19
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OpenStudy (priyar):
what is f ?
OpenStudy (stormer15):
do you have an equation
OpenStudy (cheesecakekitten):
No..This is it.
OpenStudy (stormer15):
you need an equation to solve
OpenStudy (priyar):
no..check ur question again..
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OpenStudy (cheesecakekitten):
Please explain.
OpenStudy (priyar):
f must be defined..only then we can solve it
OpenStudy (priyar):
otherwise its just a letter!
OpenStudy (cheesecakekitten):
Oh wait...
OpenStudy (stormer15):
why you need an equation?
example:
f(x) = 3x + 5
f(-12) = 3*-12 + 5
f(-12) = -31
------------------------
that is why you need one
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OpenStudy (cheesecakekitten):
I know i know f(x) = |x + 7| that's the equation. I'll edit it into the question too.
OpenStudy (stormer15):
f(-12) = |-12 + 7|
OpenStudy (priyar):
substitute -12 in place of x
OpenStudy (cheesecakekitten):
5 thanks.
OpenStudy (priyar):
correct!
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OpenStudy (stormer15):
correct :)
OpenStudy (cheesecakekitten):
Both of you deserve medals. BUT THERE CAN BE ONLY ONE SO I'LL FAN ANOTHER.
OpenStudy (cheesecakekitten):
Thanks again!
OpenStudy (stormer15):
anytime \(\ddot\smile\)
OpenStudy (cheesecakekitten):
I have a few more. :)
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OpenStudy (priyar):
its ok..@Stormer15 gave me a medal.. thanks @Stormer15 ..
OpenStudy (stormer15):
yw :)
OpenStudy (cheesecakekitten):
f(x) = |x - 5| + 3
Evaluate f(2).
A. 6
B. 4
C. 0
D. 11
OpenStudy (stormer15):
f(2) = |2-5| + 3
OpenStudy (priyar):
its similar to last q
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OpenStudy (priyar):
do u understand what we are doing @CheesecakeKitten in both q's?
OpenStudy (cheesecakekitten):
yup.
OpenStudy (priyar):
ok thats good!
OpenStudy (cheesecakekitten):
The answer is 0. :)
OpenStudy (priyar):
no..|-3| = 3 (||--> stands for always positive)
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OpenStudy (priyar):
so what will be the answer?
OpenStudy (cheesecakekitten):
What do you mean? The only answers are 6, 4, 0, and 11.
OpenStudy (priyar):
yes.. i just told u the first term..there is still a 3 to be added..
OpenStudy (cheesecakekitten):
Oh okay so 6?
OpenStudy (priyar):
yeah! correct
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OpenStudy (cheesecakekitten):
OH GOOD.