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Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.