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Chapter 1

Chapter 1. Review. Objectives. By the end of the class, you will be able to… Write algebraic equations from word phrases Solve one-step equations with one variable. Let’s Review: Equations vs. Expressions. Expressions. Equations. Have an equals (=) sign Ex. 3x + 5 = 11

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Chapter 1

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  1. Chapter 1 Review

  2. Objectives • By the end of the class, you will be able to… • Write algebraic equations from word phrases • Solve one-step equations with one variable

  3. Let’s Review: Equations vs. Expressions Expressions Equations Have an equals (=) sign Ex. 3x + 5 = 11 4y + 8 – 2x =72 • Do not have an equals (=) sign • Ex: 3x + 5 4y + 8 – 2x

  4. Let’s Review: Algebraic Word Phrases • is means = • Equals means= • Ex: nine times a number x minus 95 equals 37 9x – 95 = 37

  5. Let’s Review: Algebraic Word Phrases • is means = • Equals means= • Ex: five times the number x squared plus 26 is 35 5x2 + 26 = 35

  6. Let’s Review: Algebraic Word Phrases • Some word phrases have two parts • Ex: three times the sum of b and c is 27 3(a + b) = 27

  7. Let’s Review: Algebraic Word Phrases • Some word phrases have two parts • Ex: 4 times the difference of x and 14 is 32 4(x - 14) = 32

  8. Let’s Review: Algebraic Word Phrases • Some equations don’t have a specific answer • Ex: five times the number x squared isthree times the sum of b and c. 5x2=3(b+ c)

  9. Let’s Review: Algebraic Word Phrases • Some equations don’t have a specific answer • Ex: 16 plus 3 times a number x isthe difference of b and c. 16 + 3x =b - c

  10. Your Turn, What’s the Equation? • Some equations don’t have a specific answer • Ex: 3 times a number x squared is5 times the difference of b and c.

  11. Your Turn, What’s the Equation? • Some equations don’t have a specific answer • Ex: 3 times a number x squared is5 times the difference of b and c. 3x2=5(b – c)

  12. What is the equation? • The first ice cream plant was established in 1851 by Jacob Fussell. Today, 2,000,000 gallons of ice cream are produced in the US each day. In how many days can 40,000,000 gallons of ice cream be produced in the US?

  13. What is the equation? • The first ice cream plant was established in 1851 by Jacob Fussell. Today, 2,000,000 gallons of ice cream are produced in the US each day. In how many days can 40,000,000 gallons of ice cream be produced in the US? • 40,000,000 = 2,000,000x

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