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Published byAntony Ward Modified over 9 years ago

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Prerequisite Skills VOCABULARY CHECK Copy and complete the statement. 2. Two lines in the same plane are if they do not intersect. ? ? The least common multiple of 10 and 15 is. 1. 30 ANSWER parallel ANSWER

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3. x – y = 4 Prerequisite Skills SKILL CHECK Graph the equation. 4. 6x – y = –1

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Prerequisite Skills SKILL CHECK Graph the equation. 6. 3x – 2y = –12 5. 4x + 5y = 20

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7. 5m + 4 – m = 20 Prerequisite Skills SKILL CHECK Solve the equation. 8. 10(z +5) + z = 6 4 ANSWER –4–4

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9. y = 2x –3, y + 2x = –3 Prerequisite Skills SKILL CHECK Tell whether the graphs of the two equations are parallel lines. Explain your reasoning. 10. y – 5x = –1, y – 5x = 1 Not parallel; the slope of the graph of the first equation is 2, while the slope of the graph of the second equation is 2. ANSWER Parallel; the 2 lines have a slope of 5, but different y -intercepts. ANSWER

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Prerequisite Skills SKILL CHECK Tell whether the graphs of the two equations are parallel lines. Explain your reasoning. 11. y = x + 10, x – y = –9 12. 6x – y = 4, 4x – y = 6 Parallel; the 2 lines have a slope of 1, but different y -intercepts. ANSWER Not parallel; the slope of the graph of the first equation is 6, while the slope of the graph of the second equation is 4. ANSWER

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Prerequisite Skills SKILL CHECK Graph the inequality. 14. x – y < 5 13. y –2x + 1

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Prerequisite Skills SKILL CHECK Graph the inequality. 16. y > 3 15. x –4

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