Let a function of 2 variables be defined by (a, b) = ab (a b).

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Let a function of 2 variables be defined by ƒ(a, b) = ab − (a − b). What is the value of ƒ(8,9)?
A. 89
B. 73
C. 71
D. 34
E. 0

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10 ACT Practice Tests

ISBN: 9780071591461

2nd Edition

Authors: Steven Dulan

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