## rockets31 3 years ago what does the @ sign mean in algebra

1. precal

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

2. rockets31

no my algebra teacher put it on a worksheet

3. precal

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

4. rockets31

a@b =2a/b and a#b- 2a^2 +3b-5 find the value of 3@(2#4)

5. precal

what is a# b - did you mean to write a#b = -2a^2+3b-5

6. rockets31

yes sorry

7. precal

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

8. precal

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

9. rockets31

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

10. rockets31

11. precal

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

12. rockets31

that makes sense

13. precal

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

14. precal

have fun, you will see these on SAT's

15. rockets31

ok ill try to :)