



 
Hello Martha,
This means that the number which corresponds to the n^{th} letter of the alphabet is given by 4(n  1). ‘A’ is the first letter, thus its number is 4(1  1) = 4(0) = 0. ‘F’ is the sixth letter, and its number is 4(6  1) = 4(5) = 20. This should help you with parts a)d). Part e) requires slightly more work. We must determine which letter fills in _@#$ where @ + # + $ = 258. Well @,#,and $ are consecutive numbers, so # = @ + 1 and $ = @ + 2. Thus 3@ + 3 = 258 and we can solve for @, bringing us back to a situation like in parts c) or d). Tyler  


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