Final answer:
To factor -6 out of 18z - 15, divide each term by -6, resulting in -6(-3z + 2.5).
Step-by-step explanation:
To factor -6 out of the expression 18z - 15, we are looking for the greatest common factor (GCF) of the two terms, which is 3. However, since the question asks to factor out -6 specifically, we will go through the steps to factor -6 out of the given expression.
The expression 18z - 15 can be factored by -6 as follows:
Divide each term by -6.
18z divided by -6 is -3z.
-15 divided by -6 is 2.5 or ½5.
The factored expression is -6(-3z + 2.5).