Final answer:
The expression '8h' evaluates to '-8' when the value of 'h' is '-1'. This can be obtained by substituting '-1' for 'h' in the given mathematical expression.
Step-by-step explanation:
The subject here is Mathematics, specifically the evaluation of mathematical expressions. To evaluate the expression '8h' when 'h' is -1, we simply substitute '-1' in place of 'h'.
So, we replace 'h' with '-1' in '8h', which gives us '8 * -1'. The result of multiplying 8 by '-1' is '-8'.
In summary, if h = -1, then 8h = -8. Therefore the solution to the expression is -8. This procedure is often referred to as substituting variables in mathematics.
Learn more about Evaluating expressions