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Over Lesson 5–2 A.A B.B C.C D.D 5-Minute Check 3 Find the perimeter and area of the figure. The width of a rectangle is 7 meters and its length is 6 meters. Find its perimeter. The height of a right triangle is 4 feet and the width of its base is 6 feet. Find its area. Over Lesson 5-1

Over Lesson 5–2 A.A B.B C.C D.D 5-Minute Check 3 A.P = 24 in.; A = 48 in. 2 B.P = 24 in.; A = 144 in. 2 C.P = 48 in.; A = 144 in. 2 D.P = 48 in.; A = 48 in. 2 Find the perimeter and area of the figure. Over Lesson 5-1

Over Lesson 5–2 A.A B.B C.C D.D 5-Minute Check 4 A.44 m B.42 m C.28 m D.26 m The width of a rectangle is 7 meters and its length is 6 meters. Find its perimeter. Over Lesson 5-1

Over Lesson 5–2 A.A B.B C.C D.D 5-Minute Check 5 A.24 ft 2 B.12 ft 2 C.10 ft 2 D.6 ft 2 The height of a right triangle is 4 feet and the width of its base is 6 feet. Find its area. Over Lesson 5-1

Then/Now You have already solved equations and graphed the solution on a number line. (Lessons 4–3 and 4–4) Write inequalities. Graph inequalities on a number line.

Vocabulary Inequality – a mathematical sentence that compares quantities that are not equal and contain the symbols, ≤ or ≥ Example: x > 5

Example 1 A Write an Inequality A. Write an inequality for the following sentence. Your height is greater than 52 inches. Answer: h > 52

Example 1 B Write an Inequality B. Write an inequality for the following sentence. Your speed is less than or equal to 62 mph. Answer: s ≤ 62

Example 1 CYP A A.h < 48 B.h > 48 C.h ≤ 48 D.h ≥ 48 A. Write an inequality for the following sentence. Your height is less than 48 inches.

Example 1 CYP B A.a < 12 B.a > 12 C.a ≤ 12 D.a ≥ 12 B. Write an inequality for the following sentence. Your age is greater than 12 years.

Concept

Example 2 Write an Inequality ENVIRONMENT To meet a certain air quality standard, an automobile must have a fuel efficiency of at least 27.5 miles per gallon. Write an inequality to describe this situation. Answer: The inequality is f ≥ 27.5.

Example 2 CYP A.s < 2 B.s > 2 C.s ≤ 2 D.s ≥ 2 CAFETERIA The school cafeteria allows each student no more than 2 servings of dessert during lunch. Write an inequality to describe this situation.

Example 3 A Determine the Truth of an Inequality A. For the given value, state whether the inequality is true or false. s – 9 < 4, s = 6 s – 9<4Write the inequality. Answer: The sentence is true. 6 – 9 < 4Replace s with 6. ? –3<4Simplify.

Example 3 B Determine the Truth of an Inequality B. For the given value, state whether the inequality is true or false. Write the inequality. Answer: The sentence is false. Replace a with ≤12 + 1Simplify. ? ? 14 ≤13Simplify.

Example 3 CYP A A.true B.false C.sometimes true D.cannot be determined A. For the given value, state whether the inequality is true or false. 12 – m > 7, m = 5

Example 3 CYP B B. For the given value, state whether the inequality is true or false. A.true B.false C.sometimes true D.cannot be determined

End of the Lesson