By Laurie Boswell, Holt Mcdougal
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Extra resources for Algebra: Concepts and Skills
5x > 20 7. Complete: An x value of 4 is a ____ ? of the equation x ϩ 1 ϭ 5, because 4 ϩ 1 ϭ 5. Skill Check Check to see if a ؍5 is or is not a solution of the equation. 8. a ϩ 8 ϭ 13 9. 27 ϭ 36 Ϫ 2a 10. a Ϫ 0 ϭ 5 11. 2a ϩ 1 ϭ 11 12. 6a Ϫ 5 ϭ 15 13. 5a ϩ 4 ϭ 26 14. 45 Ϭ a ϭ 9 15. a2 ϩ 2 ϭ 27 40 16. ᎏᎏ ϭ 8 a Check to see if b ؍8 is or is not a solution of the inequality. 17. b ϩ 10 > 19 18. 14 Ϫ b ≤ 3 19. 5b > 35 20. 8 ≥ 64 Ϭ b 21. 3b Ϫ 24 > 0 22. 16 ≤ b2 23. 60 > 7b ϩ 3 24. 18 Ϫ b < 10 25.
HINT: 1 mi2 ϭ 640 acres section township MICHIGAN land patterns result from the Ordinance of 1785. The Northwest Territory became the states of Ohio, Indiana, Illinois, Michigan, Wisconsin, and part of Minnesota. 34 Chapter 1 CHALLENGE You want to hire a live band for a school dance. You have $175 in your budget. The live band charges $75 per hour and each student pays $2 admission. 39. If the band is to play for 3 hours, how much extra money do you need to raise? Connections to Algebra Standardized Test Practice 40.
The sum of 20 and a number is 30. 25. A number increased by 10 is greater than or equal to 44. 26. 18 decreased by a number is 6. 27. 35 is less than the difference of 21 and a number. 28. The product of 13 and a number is greater than 60. 29. 7 times a number is 56. 30. A number divided by 22 is less than 3. 31. The quotient of 35 and a number is 7. WRITING AND SOLVING EQUATIONS Write the sentence as an equation. Let x represent the number. Use mental math to solve the equation. Then check your solution.
Algebra: Concepts and Skills by Laurie Boswell, Holt Mcdougal