Final answer:
The expression that equals 8 is 8x (5-4), because when we calculate what's inside the parenthesis first (5-4=1), and then multiply by 8, we get 8x1 which equals 8.
Step-by-step explanation:
To identify which expression equals 8, we need to perform the given operations on each one. We'll start with basic principles of arithmetic operations - addition, subtraction, multiplication, and division - and their order to solve the expressions.
8x (5-4): By following the order of operations, we first calculate what's inside the parenthesis, which is 5-4. That equals 1. Hence, 8 x 1 equals 8.
(8 x 5) - 4: Multiplying 8 x 5 gives us 40. Subtracting 4 results in 36, which is not equal to 8.
(8 x 5 - 4): This expression lacks brackets, so we follow the order of operations, starting with multiplication. We multiply 8 by 5 to get 40, and then subtract 4, which equals 36.
8 x 5 - 4: This is identical to the previous expression and will also yield 36 following the order of operations.
The expression that has a value of 8 is 8x (5-4).