Final answer:
The expression 6(-5) simplifies to -30, according to the multiplication rule for two numbers with opposite signs.
Step-by-step explanation:
To simplify the expression 6(-5), you must multiply the two numbers. Since one of the numbers is positive (6) and the other number is negative (-5), the multiplication rule states that the product will have a negative sign. Multiplying the absolute values (ignoring the signs) of 6 and 5 gives us 30. However, because one of the original numbers is negative, the product is -30.
Therefore, the simplified result of 6(-5) is -30.