L1-6: Writing Equations Objectives: (Do not write) Students will become familiar with and model word problems Students will solve algebraic word problems

Solving Word Problems: a) Name a variable b) Write an equation c) Solve (check) Types of problems: Translate Percent Set amount – per unit amount “part” is the amount “affected” by the % and must match the % Original (starting) amount Change per unitSet amount

Examples: Write an equation and solve. 1)An appliance repair service charges $50.00 per job plus $12.00 per hour. What is the cost of a 3 hour job? a) Let c=cost and h=hours b) C = ____ h + _______ 5012 c) C = 12(3) + 50 C = $86

2)If you invested in a stock at and the value is now. What percent of the original investment is the value now? a) Let p=percent b) c)

Challenge The World Record (WR) for 800m run has decreased since 1930 by 1.82min minus times years since What would be the current (2010) WR time? How would you find years passed? a)Let t = time to run and y = # of years b)t = 1.82 – (y) c)t = 1.82 – (80) t = 1.54 minutes Extra: Look it up!! Is this true???? Subtract 1930 from current year Did you know 800 m is ½ mile!!!!