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OpenStudy (skullcandy229):
Two-fifths of a number is decreased by three. Find the value of the expression if the number is twenty-five.
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OpenStudy (anaise):
2/5 of 25 is 10, minus 3 is 7.......right?
OpenStudy (skullcandy229):
yes i think
OpenStudy (anaise):
or it could be 12
OpenStudy (shadowlegendx):
How could it be 12, lol
OpenStudy (shadowlegendx):
Itʻs 7
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OpenStudy (shadowlegendx):
Agred?
OpenStudy (anaise):
i was thinking sumthin else
OpenStudy (anaise):
marking coordinates on my globe
OpenStudy (shadowlegendx):
waaat
OpenStudy (shadowlegendx):
Iʻll mark your globe
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OpenStudy (shadowlegendx):
;)
OpenStudy (skullcandy229):
one more thing Evaluate the expression w square - v + 1 for w = -2 and v = -8.
OpenStudy (anaise):
anywaay
OpenStudy (anaise):
hold up
OpenStudy (shadowlegendx):
\[-2^{2} -(-8) + 1\]
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OpenStudy (shadowlegendx):
I got that from the original equation
\[w ^{2} - v + 1\]
OpenStudy (shadowlegendx):
Do you know how to solve that?
OpenStudy (anaise):
ugh.......brb
OpenStudy (shadowlegendx):
You just have to follow the Order of Operations
OpenStudy (anaise):
PEMDAS
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OpenStudy (shadowlegendx):
^
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
OpenStudy (shadowlegendx):
Lets start with parenthesis
-(-8)
This is basically saying
+ 8
Hereʻs why |dw:1448913528952:dw|
OpenStudy (shadowlegendx):
Just think of it as "plus, plus"
|dw:1448913681583:dw|
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