(-15) + 91 = 76 [ -5 times (-15) ] + 1 = 76 (-1,140) / (-15) = 76
Actually I believe it is -116.5
Red is positive. If they are both black then the cable that is connected to ground is negative and the other cable is positive.
91 - 38 = 53
91 - 16 = 75
91 - 63 = 28
86 is the mean of 85, 91, 76, 85, and 93.
104 minus 13 is 91.
48
82.
91
91 minus 8 is 83.