rockets31
what does the @ sign mean in algebra



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precal
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does not have meaning that I am aware of. Did you see it in a SAT question?

rockets31
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no my algebra teacher put it on a worksheet

precal
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post the question, but you might want to ask you teacher. Maybe it is a typo and they meant the number 2

rockets31
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a@b =2a/b and a#b 2a^2 +3b5 find the value of 3@(2#4)

precal
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what is a# b 
did you mean to write a#b = 2a^2+3b5

rockets31
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yes sorry

precal
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well a is your 3 and b is your 2#3
they are using it as a place holder (for a lack of a better word)
this means a=3

precal
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ok Let me work this out for you. In SAT they sometimes use a heart or some type of symbol  means nothing just defines things

rockets31
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ok i get that i just didnt know what to do with the @ sign

rockets31
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thanks for your help

precal
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ok here it goes
a#b=\[2a^2+3b5\]
2#4 means a is 2 and b is 4 so sub
2#4=\[2(2)^2+3(4)5\]=1

rockets31
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that makes sense

precal
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a@b = (2a)/b
3@(2#4)=3@1 so a is 3 and (2#4) is 1
3@1=(2*3)/1=6

precal
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have fun, you will see these on SAT's

rockets31
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ok ill try to :)