The Mean Of Those Numbers Is 72.
~Spades
Answer: x = 6.56
Step-by-step explanation: -0.4x - 0.5 + x = 3.63
-0.4x^2 - 0.5 = 3.63
-0.4x^2 = 4.13
0.63x = 4.13
x = 6.56
Well, 4/5 is equal to 0.80 and 3/8 is equal to 0.375 and if you take the two and subtract them, you should end up with 0.425 or approximately 4/10 or 1/2.