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146 - 128 = 18
128 - 40% = 76.8
696
2x to the fourth power minus 162 equals -146
128
Answer 146 - 56 = 90 :)
-146
238 minus 92 is 146. Simple math.
16
The mean is 144
427 - 299 = 128
-122 - 6 = -128