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2-9 Writing Equations Warm-up Problems

2-9 Writing Equations Warm-up Problems. Write an algebraic expression. Six less than five times n. One third the sum of p and q. Doug is five years more than 3 times Lee’s age. Let L be Lee’s age. Write an expression for Doug’s age.

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2-9 Writing Equations Warm-up Problems

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  1. 2-9 Writing EquationsWarm-up Problems • Write an algebraic expression. • Six less than five times n. • One third the sum of p and q. • Doug is five years more than 3 times Lee’s age. Let L be Lee’s age. Write an expression for Doug’s age. • Let d be the number of miles Jay runs each week. Nina runs 5 less than twice as far as Jay. Write an expression for the distance Nina runs each week.

  2. Chapter 2 2-9 Writing Equations

  3. Example 1 • Write an equation that could be used to solve the problem. • Jose’s salary this year was $23,400. This is $1700 more than he made last year. What was his salary last year?

  4. Example 2 • Write an equation that could be used to solve the problem. 2. A color television set uses about 420 kilowatt hours (kWh) of electrical energy in a year. That is 3.5 times the amount of energy used by a black-and-white set. How many kWh does a black-and-white set use in a year?

  5. Example 3 • Write an equation that could be used to solve the problem. 3. In baseball, a player’s batting average multiplied by the number of times at bat equals the number of hits. A player had 125 at-bats and 36 hits. What was this player’s batting average?

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