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by Gavin McGerald Words Into Symbols Objective: To translate word phrases into algebraic expressions and word sentences into equations

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by Gavin McGerald Expressions examples a.A number decreased by 3 b.A number increased by 7 c.4 more than the square of a number d.The difference of twice a number and 5 e.Twice the sum of a number and 5 a.X – 3 b.n + 7 c.b d.2n – 5 e.2(x + 5)

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by Gavin McGerald In a word problem A train leaves town A going east at 70m mph toward town B, another train from town A left an hour later at 60 mph going west. What is the distance between the two trains after x hours? D = rt 60(x-1)70x 60(x-1) + 70x = 60x – x = 130x - 60 TownA

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by Gavin McGerald Consecutive Numbers The sum of 4 consecutive odd integers is 64 find each integer First number is x, next number must be x + 2 the third x + 4 and so on. x + (x + 2) + (x + 4) + (x + 6) = 64 4x + 12 = 64 4x = 52 x = 13 13, 15, 17, 19

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