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12 + (-7) 5 2.4 + (-3.1) -.7 -35 + 41 + (-18) -12 -2 - 7 - (-8) -1 -18 - 14 - (-15) -17 - 20 - |-12| + |-6| -26 (-3 )(12) -36 (-7)(-6)(-2) -84 5 (x + 12) 5x + 60 5.5 (b-10) 5.5b - 55 -2.5 (z - 5) -2.5z + 12.5 48 / (-12) -4 55 / (-1.1) -50 48 / (-3/4) -64 probability of choosing a red marble from a bag with 12 red marbles, 48 total marbles .25 or 1/4 odds of choosing a red marble from a bag with 12 red marbles, 48 total marbles 1 to 3 |-9| - 2x + 5 when x = 6 2 1 - (2x squared) when x = -2 -7 simplify -9 (y + 11) -9y - 99 Find and simplify an expression for the perimeter of a rectangle where the lengths of its opposite sides are x and x-7. 4x - 14