Final answer:
The missing value in the multiplication sentence 72 = (-8)(?) is -9. This is because dividing 72 by -8 yields -9, which conforms to the rule of signs in multiplication.
Step-by-step explanation:
The question refers to finding the missing value in a multiplication sentence that reads: 72 = (-8)(?). To solve this, we need to divide 72 by -8 because multiplication and division are inverse operations. Therefore, the missing value is -9 because 72 ÷ (-8) = -9. This concept is part of basic arithmetic operations where when two numbers with opposite signs are multiplied, the result is negative.