Final answer:
To combine the terms in the expression 4z - (-3z), you rewrite it as 4z + 3z and add the coefficients to get 7z.
Step-by-step explanation:
To combine like terms, you need to add or subtract the coefficients of terms with the same variable. In the expression 4z - (-3z), the terms have the same variable 'z'. To combine them, you can rewrite the expression as 4z + 3z, since subtracting a negative is equivalent to adding a positive. Adding the coefficients 4 and 3, you get a final answer of 7z.
Learn more about Combining like terms in an algebraic expression