A marching band takes 5 steps forward and 3 steps back during the Republic Day parade. According to this, since the wind in this marching band took a total of 460 steps, how many steps did he go from the starting point? solution please

Given this information, which expression must represent the value of b?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

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.