Answers for 15, 17, and 19

15)  3x^2-3x+2

17)  4x^3+3x^2-4x

19)  3x^3-2x^2-8x+3

Step-by-step explanation:

15)  (4x^2-x-3) - (x^2+2x-5)

       4x^2 -x-3 -x^2 -2x +5   Multiply the right side by -1, then remove ()

       4x^2 -x^2 -x-2x +5-3    Combine like terms

       3x^2-3x+2     Final Answer

17)  (7x^3 +3x^2 +4x +10) - (10 +8x+ 3x^3)

      7x^3 +3x^2 +4x +10 - 10 -8x -3x^3  Multiply right side by -1, remove ()

      7x^3 -3x^3 +3x^2 -8x +4x +10 -10   Combine like terms

      4x^3 +3x^2 -4x    Final Answer

19)  (8x^3 +3x^2 -8x +10) - (7 +5x^2 +5x^3)

       8x^3 +3x^2 -8x +10 -7 -5x^2 -5x^3   Multiply right side by -1, remove ()

       8x^3 -5x^3 -5x^2 +3x^2 -8x +10 -7  Combine like terms

       3x^3 -2x^2 -8x +3   Final Answer

the data of the detroit pistons in numerical order from least to greatest is 0.30, 0.37, 0.55, 0.62, 0.69, 0.72, 0.73, 0.75, 0.77, 0.78, 0.80, 0.81, 0.81, 0.83, 0.84, 0.89

the data of the miami heat in numerical order from least to greatest is 0.50, 0.50, 0.56, 0.57, 0.67, 0.72, 0.72, 0.72, 0.75, 0.75, 0.76, 0.81, 0.82, 0.90, 1.00, 1.00

the detroit pistons median : 1.52

the miami heat median: 1.47

the iqr of this data is 0.05

inverse operation of addition