An expression is defined as a set of numbers, variables, and mathematical operations. The expression that has the same value as the given expression is 12 + (-9). The correct option is A.
In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
The given expression can be simplified as shown below.
8 + [ 4 + (-9) ]
= 8 + (4 - 9)
= 8 + (-5)
= 8 - 5
= 3
Now, the option that is correct and is equal to the given expression is,
A.) 12 + (-9)
= 12 - 9
= 3
B.) -12 + 9
= -3
C.) -4 + (-9)
= -4 - 9
= -13
D.) 4 + (-9)
= 4 - 9
= -5
Hence, the expression that has the same value as the given expression is 12 + (-9).
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