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mgb5e_ppt_2_6

# mgb5e_ppt_2_6 - 2.6 Formulas and Problem Solving Formulas A...

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§ 2.6 Formulas and Problem Solving

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Martin-Gay, Beginning Algebra, 5ed 2 Formulas A formula is an equation that states a known relationship among multiple quantities (has more than one variable in it) A = lw (Area of a rectangle = length · width) I = PRT (Simple Interest = Principal · Rate · Time) P = a + b + c (Perimeter of a triangle = side a + side b + side c) d = rt (distance = rate · time) V = lwh (Volume of a rectangular solid = length · width · height)
Martin-Gay, Beginning Algebra, 5ed 3 Using Formulas A flower bed is in the shape of a triangle with one side twice the length of the shortest side, and the third side is 30 feet more than the length of the shortest side. Find the dimensions if the perimeter is 102 feet. 1.) UNDERSTAND Read and reread the problem. Recall that the formula for the perimeter of a triangle is P = a + b + c . If we let x = the length of the shortest side, then 2 x = the length of the second side, and x + 30 = the length of the third side Example: Continued

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Martin-Gay, Beginning Algebra, 5ed 4 Using Formulas
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mgb5e_ppt_2_6 - 2.6 Formulas and Problem Solving Formulas A...

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