--7 = +7
35
10
replace b with 7 so you must first multiply -3 by 7 which gives you -21. Subtract 25 more and you get -46, which is the answer.
7
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.
An equivalent expression.
The value of the expression 8 is always 8, whatever f is.
?
10
35
7
To evaluate the expression when ( n ) equals a specific value, you substitute that value into the expression in place of ( n ). For example, if the expression is ( f(n) = n^2 + 3n ), you would calculate ( f(7) ) by substituting 7 for ( n ), resulting in ( 7^2 + 3(7) ). Similarly, for ( n = 0.4 ), you would substitute 0.4 into the expression and compute the result. This process allows you to find the numerical value of the expression for those specific values of ( n ).
You can write this as "g - 7". The actual value of this expression, of course, will depend on the value of "g".
5n if n = 7 is 5 x 7, or 35.
10
It can also be written as 3x + 7. The value of the expression will depend on the value of x.
If you mean: 4x-14x+7 then the expression can be simplified to 7-10x