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Definition: (adjective) having the skill and knowledge needed for a particular task; capable
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Math Teaser
Problem
30% of 80 is what percent of 24?
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SAT SUBJECT TESTS: Math 2 Question #1

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Question: If , then

Choices:
A. -3
B. -1
C. 1
D. 3
E. 9



The correct answer is A. Inverse functions undo each other, so . Substitute -9 for . and solve for x:

  
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