Rewrite each subtraction as an addition. Solve.
1. x - 7 = 12 2. y - (-1) = -5 3. -4 = p - 2 4. -7 = 4 - a

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.