Question

evaluate the expression when a = 12. a·−5

Explanation:

Step1: Substitute \( a = 12 \) into the expression

We have the expression \( a \cdot -5 \), and we substitute \( a = 12 \) into it, so we get \( 12 \cdot -5 \).

Step2: Perform the multiplication

We calculate \( 12 \times (-5) \). When we multiply a positive number by a negative number, the result is negative. So \( 12 \times 5 = 60 \), and then we add the negative sign, so \( 12 \times (-5) = -60 \).

Answer:

\( -60 \)