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For all numbers x and y, the function x#y = (x+2)(y-1). What is the va

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Math Expert
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Joined: 02 Sep 2009
Posts: 64314
For all numbers x and y, the function x#y = (x+2)(y-1). What is the va  [#permalink]

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New post 24 Jan 2020, 01:52
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

78% (01:17) correct 22% (00:53) wrong based on 27 sessions

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Director
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Joined: 25 Jul 2018
Posts: 719
For all numbers x and y, the function x#y = (x+2)(y-1). What is the va  [#permalink]

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New post 24 Jan 2020, 02:05
For all numbers x and y, the function x#y = (x+2)(y-1). What is the value of 2#[3#(-1#1)]?

—>(—1#1) = (—1+2)(1–1)= 0

—>( 3#0)= (3+2)(0–1)= —5

—>( 2#—5)= (2+2)(—5–1) = —24

The answer is B

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For all numbers x and y, the function x#y = (x+2)(y-1). What is the va   [#permalink] 24 Jan 2020, 02:05

For all numbers x and y, the function x#y = (x+2)(y-1). What is the va

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