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Prerequisite Skills VOCABULARY CHECK 1. Identify one ordered pair that is a solution of 8x – 5y = 22. Sample answer: (1, 2) ANSWER 2. Are 7x – 4 = 10 and x = 3 equivalent equations? Explain. ANSWER No; because the solution of 7x – 4 = 10 is x = 2, the two equations do not have the same solution.

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Prerequisite Skills VOCABULARY CHECK 3. The absolute value of a number a is the distance between a and on a number line. ? ANSWER

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Prerequisite Skills SKILLS CHECK Check whether the given number is a solution of the equation or inequality. 4. x – 2 = 3; 5 Solution ANSWER 5. s + 3 =12; 9 Solution ANSWER Not a Solution ANSWER y > 20; 3 7. p – 3 5 ≤ 4; 23 Solution ANSWER

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Prerequisite Skills SKILLS CHECK Solve the equation. Check your solution. 8. m + 8 = –20 –28 ANSWER –7x = 35 –5 ANSWER ANSWER –29 9 –9r – 4 = 25 t – 7t = 9 –3 ANSWER

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Prerequisite Skills SKILLS CHECK For the given value of a, find a and |a|. a = –3 3, 3 ANSWER a = –5.6 5.6, 5.6 ANSWER a = 14 ANSWER –14, 14 a = 0 0, 0 ANSWER

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Prerequisite Skills SKILLS CHECK Graph the equation. y = –7x + 3 ANSWER

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Prerequisite Skills SKILLS CHECK Graph the equation. x + 3y = –5 ANSWER

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Prerequisite Skills SKILLS CHECK Graph the equation. x = –8 ANSWER

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Prerequisite Skills SKILLS CHECK Graph the equation. y = 4 ANSWER

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