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mgb5e_ppt_2_8 - 2.8 Further Problem Solving Strategy for...

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§ 2.8 Further Problem Solving
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Martin-Gay, Beginning Algebra, 5ed 2 Strategy for Problem Solving General Strategy for Problem Solving 1) UNDERSTAND the problem Read and reread the problem Choose a variable to represent the unknown Construct a drawing, whenever possible Propose a solution and check 2) TRANSLATE the problem into an equation 3) SOLVE the equation 4) INTERPRET the result Check the proposed solution in problem State your conclusion
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Martin-Gay, Beginning Algebra, 5ed 3 Distance Problems: Finding Time distance = rate · time or d = r · t When the amount in the formula is distance , we refer to the formula as the distance formula . xample: hile swimming in the ocean, Missy’s sunglasses fell off her head. If the sunglasses fall at a rate of 4 feet per second, how long will it take for them to fall 70 feet to the sand at the bottom? Continued 1.) UNDERSTAND Let t = the time it takes the glasses to fall
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Martin-Gay, Beginning Algebra, 5ed 4 Distance Problems: Finding Time 17.5 = t Check : rate · time = 4 · 17.5 = 70 Example continued: 2.) TRANSLATE d = rt 70 = 4 t 3.) SOLVE 4.) INTERPRET It will take Missy’ sunglasses 17.5 seconds to fall to the bottom.
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