math

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how many side and angles does a trapezoid angle, hexagon, and pentagon have?
solve each equation:
13 + y = -3, 3y + 8=3, y over 3= -9

need help with + & - rules for adding whole numbers, decimals, fractions and integers ( do not understand) and rule for multiplying + & -

  • math -

    Google the fist question
    hint --- hex means 6 and pent means five
    13 + y = -3
    -13 = -13 add
    -----------------
    13-13 + y = -16
    y = -16
    =============================
    3y + 8=3
    -8 = -8 add
    ---------------
    3 y + 0 = -5
    y = -5/3
    =============================
    y over 3= -9
    3 (y/3) = 3 (-9)
    y = -18

  • math -

    sorry i do not understand. this is 6th grade math. i am suppose to solve for y. not change what it is equal to.
    13 + y = -3

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