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What is the average rate of change for this function for the interval from x=2 to x=4 ?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?