Mathematics: You pay $1.75 for 5 cookies. what is the unit price?

You pay $1.75 for 5 cookies. what is the unit price?

Ответ:

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20.06.2020

a) If you have the flu then you miss the final examination, b) You do not miss the final examination if and only if you pass the course, c) f you miss the final examination then you do not pass the course, d) Either you have the flu or you miss the final examination or you pass the course, e) If you have the flu then you do not miss the final examination or if you miss the final examination then you do not pass the course, f) You have the flu and you miss the final examination or you do not miss the final examination and you pass the course.

Step-by-step explanation:

Let be p : You have the flu, You miss the final examination and r : You pass the course.

a) $p \rightarrow q :$ If you have the flu then you miss the final examination.

b) $\neg q \iff r:$ You do not miss the final examination if and only if you pass the course.

c) $q \rightarrow \neg r:$ If you miss the final examination then you do not pass the course.

d) $p\lor q \lor r:$ Either you have the flu or you miss the final examination or you pass the course.

e) $(p\rightarrow \neg r)\lor (q\rightarrow \neg r):$ If you have the flu then you do not miss the final examination or if you miss the final examination then you do not pass the course.

f) $(p\land q)\lor (\neg q \land r):$ You have the flu and you miss the final examination or you do not miss the final examination and you pass the course.

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You pay $1.75 for 5 cookies. what is the unit price?

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