Answer: 6
Step-by-step explanation:
In any algebraic expression a term could be a variable(a,b,c,...), or a constant (numerical value) or a product of variables and a constant.
For example : In expression [tex]5x^2-7xy+4c-4[/tex] , there are 4 terms : [tex]5x^2,\ -7xy,\ 4c\ ,\ -4[/tex]
Let's take one more example : [tex]3y+2x-7xy^2[/tex]
In this expression there are only 3 terms , that are [tex]3y,\ 2x,\ -7xy^2[/tex]
The given expression : [tex]3x^3y + 5xz -4y + x -z + 9[/tex]
There are total 6 variable terms , that are :
[tex]3x^3y ,\ 5xz,\ -4y ,\ x,\ -z ,\ 9[/tex]
Hence, the correct answer is : 6
