Mathematics
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OpenStudy (carolina4567):
Check My Answer's Real Quick! Thank You :)
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OpenStudy (carolina4567):
v(t) = 24,500 (0.80^t)
OpenStudy (carolina4567):
Find the initial value of the car and the value after
12
years.
Initial Value = 24,500
After 12 years = 1683
OpenStudy (carolina4567):
Am I Correct ?
OpenStudy (fortytherapper):
Looks good
jhonyy9 (jhonyy9):
for initial value t=0
yes ?
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OpenStudy (carolina4567):
Mind Helping with a few more ?
OpenStudy (fortytherapper):
Yeah I'll try. I'm on mobile phone now
OpenStudy (carolina4567):
h(x) = 2x^2 + 4
Find h(4x)
My Answer is h(4x) = 16x^2 + 5 / 4x
OpenStudy (fortytherapper):
How'd you get the fraction?
jhonyy9 (jhonyy9):
do you think h(4x) or just h(4) ?
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OpenStudy (carolina4567):
Umm h(4x) = 2(4x)^2 + 4
OpenStudy (carolina4567):
I think 4x
jhonyy9 (jhonyy9):
so in this case what you have wrote above is right sure
OpenStudy (carolina4567):
Ok great :) I have a few more to check
jhonyy9 (jhonyy9):
but you need ending it again or do you like it in this form ?
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jhonyy9 (jhonyy9):
4x squared multiplied by 2
OpenStudy (carolina4567):
f(x) = 2x^2
g(x) = 4x
(f x g ) (x ) = 8x^4
( f -g) (x) = -2x^2
(f+g) (-2) = 2x^2 - 8
OpenStudy (carolina4567):
Its fine the teacher wants it like that
jhonyy9 (jhonyy9):
x^2*x why is x^4 ?
OpenStudy (carolina4567):
Hm not sure :/ , Thats what i got when I did the math
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jhonyy9 (jhonyy9):
a^2 *a=a^3 use this please
jhonyy9 (jhonyy9):
2x^2 *4x=2*4*x^2 *x = ?
OpenStudy (carolina4567):
8x^3
jhonyy9 (jhonyy9):
exactly now is right sure
OpenStudy (carolina4567):
So now there all right ?
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jhonyy9 (jhonyy9):
(f-g)(x)=?
OpenStudy (carolina4567):
-2x^2
jhonyy9 (jhonyy9):
why so ? not is right
what is f(x) and what is g(x) ?
OpenStudy (carolina4567):
f(x) is 2x^2
g(x) is 4x
jhonyy9 (jhonyy9):
so than how will be (f-g)(x) = ?
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jhonyy9 (jhonyy9):
in this case just substract the g(x) from f(x)
so how will be than ?
OpenStudy (carolina4567):
2x(x-2) ?
jhonyy9 (jhonyy9):
this is very very easy
jhonyy9 (jhonyy9):
exactly very nice
yes ?
jhonyy9 (jhonyy9):
this is more easy than you believ it
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OpenStudy (carolina4567):
So the last one is -4x^2+4x ?
jhonyy9 (jhonyy9):
(f+g)(-2)=?
first how will be (f+g)(x)=?
OpenStudy (carolina4567):
2x^2 + 4x = 2x(2+x) ?
jhonyy9 (jhonyy9):
2x^2 +2x =(f+g)(x)
jhonyy9 (jhonyy9):
yes so now than you know this just you need substituting the -2 in place of x
yes ?
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jhonyy9 (jhonyy9):
yse 4x sorry
jhonyy9 (jhonyy9):
2x^2 +4x
my bad
OpenStudy (carolina4567):
So thats our answer ?
jhonyy9 (jhonyy9):
in this case of 2x^2 +4x for you get the (f+g)(-2) = ? just you need substituting the -2 in place of x inside equation 2x^2 +4x
OpenStudy (carolina4567):
2x^2 +4(-2) ?
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jhonyy9 (jhonyy9):
yes but in place of first x too
OpenStudy (carolina4567):
Oh sorry 2(-2)^2 +4x
OpenStudy (carolina4567):
4x + 8 ?
jhonyy9 (jhonyy9):
now you have forgot the second x place
jhonyy9 (jhonyy9):
everywhere in place of x you need substituting the -2
ok. ?
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OpenStudy (carolina4567):
Yes
jhonyy9 (jhonyy9):
so than what will get ?
OpenStudy (carolina4567):
0
jhonyy9 (jhonyy9):
yse exactly this is the right answer for (f+g)(-2) = 0
jhonyy9 (jhonyy9):
do you understand it now sure right ?
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jhonyy9 (jhonyy9):
so than was my pleasure
bye bye
good luck
OpenStudy (carolina4567):
Thank You
jhonyy9 (jhonyy9):
np
welcome