SAT Math Practice Question #25012 - SATify | SATify

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SAT Math Practice Question #25012 - SATify | SATify

#25012

algebra

operations

Relative Motion

medium

90 sec

The operation $⋆$ is defined for all real numbers by $a ⋆ b = a + 2 b$ . Determine $[(1 ⋆ 2) ⋆ 3] - [1 ⋆ (2 ⋆ 3)]$ .

A.

$- 8$

B.

$- 6$

C.

$- 4$

D.

$0$

E.

$2$