Which polynomial equations have -i as one of their roots? x3 - 6 x2 - 16 x + 96 = 0 x3 - x2 + x - 1 = 0 x3 - 2 x2 + x - 2 = 0 x3 + 3 x2 + x + 3 = 0 x3 + 5 x2 - 20 = 0

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!

3x+9+4x+x=8x+9that's the answer for your question.