The = sign
The = sign
It would help if the expression was given!
Depends what the expression is. Just plug in 8 for y in the expression and that'll do it for you.
Yes.
you test it by giving the letters a value say if X equals 5 and Y equals 7 then you calculate both expressions with that value. If both answers are the same, then the simplified expression is correct, or an equivalent.
26
You don't, unless you know either the value of x or what the expression equals.
The value is 1 if (x, y) = (4, 3) and 0 otherwise.
The answer is -369.
5x=4012y=84124
try this one 25 + n
It is an expression and a term that are of equal value