Mathematics, 05.12.2019 19:31 jadeandryna0609
If the operation is defined for all integers a and b by a@b = a + b - ab, which of the following statements must be true for all integers a, b and c?
i. a@b = b@a
ii. a@0 = a
iii. (a@b)@c = a@(b@c)
(a) i only
(b) ii only
(c) i and ii only
(d) i and iii only
(e) i, ii and iii
Answers: 2
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Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.
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If the operation is defined for all integers a and b by a@b = a + b - ab, which of the following sta...
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