Splash Screen. Lesson Menu Five-Minute Check (over Lesson 5–4) Then/Now New Vocabulary Example 1: Solve Equations and Inequalities with Parentheses Example.

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Chapter 2 Vocabulary Equations.

#1. 6x = 42 #2. x – 9 = -10 # z = z #4. 12x – 3 = 4x + 13 Bell Ringer.

#1. 6x = 42 #2. x – 9 = -10 # z = z #4. 12x – 3 = 4x + 13 Bell Ringer.

Presentation transcript:

Splash Screen

Lesson Menu Five-Minute Check (over Lesson 5–4) Then/Now New Vocabulary Example 1: Solve Equations and Inequalities with Parentheses Example 2: Solve Multi-Step Equations Example 3: Standardized Test Example Example 4: Solve Multi-Step Inequalities Example 5: Null Set and Identities

Over Lesson 5–4 5-Minute Check 1 A.k > –2 B.k > –7 C.k < 5 D.k > 5 Solve the inequality k + 5 > –2.

Over Lesson 5–4 5-Minute Check 2 Solve the inequality A.n  2.7 B.n  2.7 C.n  8.7 D.n  8.7

Over Lesson 5–4 5-Minute Check 3 A.t  –4 B.t  –4 C.t  4 D.t  4 Solve the inequality

Over Lesson 5–4 5-Minute Check 4 A.r < 30 B.r < 3 C.r < –3 D.r < –30

Over Lesson 5–4 5-Minute Check 5 A.x  –18 B.x  –18 C.x  18 D.x  18

Over Lesson 5–4 5-Minute Check 5 A.m + 17 > 20.5 B.m – 3.5 < 17 C.m < 17 D.m – 17 < 20.4 Marilynn and Jackie both run track. Marilynn runs a 50-meter race 3.5 seconds slower than Jackie. It takes Jackie less than 17 seconds to run 50 meters. Which inequality represents how fast Marilynn runs the 50-meter race?

Then/Now You have already solved two-step equations and inequalities. Solve multi-step equations. Solve multi-step inequalities.

Vocabulary null or empty set identity

Example 1 Solve Equations and Inequalities with Parentheses A. Solve 5(h – 2) = 15. 5(h – 2)=15Write the equation. 5h – 10=15Distributive Property 5h – = Addition Property of Equality 5h=25Simplify. Division Property of Equality h=5Simplify. Answer: h = 5

Example 1 Solve Equations and Inequalities with Parentheses B. Solve 2(x – 4) > 11. 2(x – 4)>11Write the inequality. 2x – 8>11Distributive Property 2x – 8 + 8>11 + 8Addition Property of Inequality 2x>19Simplify. Answer: x > 9.5 Division Property of Inequality x>9.5Simplify.

Example 1 A.0 B.3 C.6 D.9 A. Solve 4(m – 3) = 12.

Example 1 A.x > 0 B.x > 2 C.x > 6 D.x > 9 B. Solve 3(x – 5) > 12.

Example 2 Solve Multi-Step Equations Solve 6(b – 2) = 2(2b + 8). Check your solution. 6(b – 2)=2(2b + 8)Write the equation. 6b – 12=4b + 16Distributive Property 6b – =4b Addition Property of Equality 6b=4b + 28Simplify. 6b – 4b=4b – 4b + 28Subtraction Property of Equality 2b=28Simplify. b=14Division Property of Equality Answer: b = 14

Example 2 A.4 B.5 C.7 D.10 Solve 4(r + 2) = 2(3r – 6).

Example 3 The Carleton Company budgeted $1825 for a banquet. The cost of the facility is $225. How much can the company spend per guest on food if there is a $3 charge per guest for linens and there are 80 guests coming to the banquet? A $15 B $17 C $20 D $25 Read the Test Item You need to find the amount per guest to spend for food.

Example 3 Solve the Test Item

Example = (f + 3)Write the equation. 1825= f + 240Distributive Property 1825= fSimplify – 465=465 – fSubtraction Property of Equality 1360=80fSimplify. 17=fDivision Property of Equality Answer: The answer is B.

Example 3 A.$3 B.$5 C.$6.50 D.$7.50 Erica is planning a party for 15 guests. Each guest will receive a photo that costs $2. She has $105 to spend altogether. How much can she spend per person for food?

Example 4 Solve Multi-Step Inequalities Solve 5x – 9  2(x + 6). Graph the solution on a number line. 5x – 9  2(x + 6)Write the inequality. 5x – 9  2x + 12Distributive Property 5x –  2x Addition Property of Inequality 5x  2x + 21Simplify.

Example 4 Solve Multi-Step Inequalities Answer:x  7 5x – 2x  2x + 21 – 2xSubtraction Property of Inequality 3x  21Simplify. x  7Division Property of Inequality

Example 4 Which number line displays the solution of 5x – 8  3(x + 4)? A. B. C. D.

Example 5 A Null Set and Identities A. Solve 3(4x – 2) + 15 = 12x (4x – 2) + 15=12x + 9Write the equation. 12x – =12x + 9Distributive Property 12x + 9=12x + 9Simplify. 12x + 9 – 12x=12x + 9 – 12xSubtraction Property of Equality 9=9Simplify. The statement 9 = 9 is always true. Answer: The equation is an identity and the solution is all numbers.

Example 5 B Null Set and Identities B. Solve 7y – 8 = 3(2y + 4) + y. 7y – 8=3(2y + 4) + y Write the equation. 7y – 8=6y yDistributive Property 7y – 8=7y + 12Simplify. 7y – 8 – 7y=7y + 12 – 7ySubtraction Property of Equality –8=12Simplify. The statement –8 = 12 is never true. Answer: The equation has no solutions and the solution set is Ø.

Example 5 A. Solve 10a – 9 = 5(2a – 3) + 6. A.0 B. C.The solution set is Ø. D.The solution set is all numbers.

Example 5 A.8x – 2 = 2(x – 4) B.8x – 2 = 2(x + 4) C.8x – 2 = 2(4x – 1) D.8x – 2 = 2(4x + 1) B. Which equation has no solution?

End of the Lesson