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Evaluate Expressions

Evaluate Expressions. Lesson 14.2. Vocabulary Terms. Terms = parts of an algebraic expression that are separated by an addition or subtraction sign. 6x + 3y Like terms = terms that have the same variable raised to the same power. 5x 2 + 4x 2. Computer Lab Problem.

christopher-anania
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Evaluate Expressions

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  1. Evaluate Expressions Lesson 14.2

  2. Vocabulary Terms • Terms = parts of an algebraic expression that are separated by an addition or subtraction sign. • 6x + 3y • Like terms = terms that have the same variable raised to the same power. • 5x2 + 4x2

  3. Computer Lab Problem • There are 24 computers in the lab. A total of three groups of students come to the lab and 2 students sit at each computer. If each group has the same number of students, how many students are in each group?

  4. Computer Lab Problem • There are 24 computers in the lab. A total of three groups of students come to the lab and 2 students sit at each computer. If each group has the same number of students, how many students are in each group? • C = computers, s = students, g= groups

  5. Computer Lab Problem • There are 24 computers in the lab. A total of three groups of students come to the lab and 2 students sit at each computer. If each group has the same number of students, how many students are in each group? • c = computers, s = students, g= groups • c times s divided by g = # of students

  6. Computer Lab Problem • There are 24 computers in the lab. A total of three groups of students come to the lab and 2 students sit at each computer. If each group has the same number of students, how many students are in each group? • c = computers, s = students, g= groups • c times s divided by g = # of students • 24(2)/3 =

  7. Computer Lab Problem • There are 24 computers in the lab. A total of three groups of students come to the lab and 2 students sit at each computer. If each group has the same number of students, how many students are in each group? • c = computers, s = students, g= groups • c times s divided by g = # of students • 24(2)/3 = 16 • There are sixteen students in each group

  8. School Food • Ricardo runs the concession stand at school. s = sales, c = cost of food products, a = advertising costs. • During the month of November, Ricardo spent $327 on food products and $50 on advertising for the concession stand. The sales were $349. How much money did the concession stand make or lose in November?

  9. School Food During the month of November, Ricardo spent $327 on food products and $50 on advertising for the concession stand. The sales were $349. How much money did the concession stand make or lose in November? s - c - a = profit/loss

  10. School Food • During the month of November, Ricardo spent $327 on food products and $50 on advertising for the concession stand. The sales were $349. How much money did the concession stand make or lose in November? • s - c - a = profit/loss • $349 - $327 - $50 =

  11. School Food • During the month of November, Ricardo spent $327 on food products and $50 on advertising for the concession stand. The sales were $349. How much money did the concession stand make or lose in November? • s - c - a = profit/loss • $349 - $327 - $50 = • $349 - $327 -$50 = $-28 (loss)

  12. Algebraic Expressions Can Be Evaluated for Different Values • Evaluate -4x + 7 for x = -2, -1, 0, and 1 X Y - 2 -1 0 1

  13. Algebraic Expressions Can Be Evaluated for Different Values • Evaluate -4x + 7 for x = -2, -1, 0, and 1 X Y - 2 -1 0 1 15 11 7 3

  14. Practice • Evaluate 2(a+b)2 / c for a = -5, b = 14, and c = -3

  15. Practice • Evaluate 2(a+b)2 / c for a = -5, b = 14, and c = -3 = - 54

  16. Practice • 6x + 5y + 17 + 2x…. How can you simplify? • 24 + 13y2 - 8y2 ….How can you simplify?

  17. Homework = PW 14.2 Odds only…

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