Verified Answer :

texaschic101
  1. (a-b)/d...a = -2, b = 3, c = 6 and d = 1/3
    (-2 - 3) / (1/3) =
    -5/(1/3) =
    -5 3 = -15 <==

    20. -a(b + c) =
       -2(3 + 6) =
        -2(9) =
         -18 < ==
       
    22. (a - b + 3d)/b
          (-2 - 3 + 3(1/3) / 3 =
          (-5 + 1)/3 =
           -4/3 <===

    23. b - a^2
          3 - (-2^2) =
          3 + 4 =
          7 <===

    25. ab^2 =
          -2     3^2 =
          -2 * 9 =
         -18 <===

    26. -(b-c)^2
          - (3 - 6)^2 =
          -(-3)^2 =
            -9 <==

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