56 Chapter 1 Linear Equations and Inequalities in One Variable 0.71a 12 0.3b 1.5 0.251b 22 0.25 0.7a 0.2b 0.05b 92. 93. 94. 95. 96. 5x 234 13 5x2 134 18 x2 Expanding Your Skills 4w 812 w2 21y 12 31y 22 4w 812 w2 21y 12 0 31y 22 0 c. Explain the difference between simplifying an expression and solving an equation. 7 8 y 1 4 1 2 a5 3 4 yb 1 3 7 15 97. A power company charges $0.12 per kilowatt-hour (kWh) and $14.89 in monthly taxes.The monthly charge C (in $) is given by C 0.12h 14.89 where h is the number of kilowatt-hours used. If a family’s bill comes to $137.77, determine the number of kilowatt-hours used. 98. For a student’s first semester at college, the college charges $105 per credit-hour plus a onetime $50 admissions fee.The cost C (in $) for the first semester is given by C 105h 50 where h is the number of credit-hours taken. If a student is billed $1415, how many credit-hours is she taking? 99. a. Simplify the expression. 100. a. Simplify the expression. b. Solve the equation. b. Solve the equation. c. Explain the difference between simplifying an expression and solving an equation. Problem Recognition Exercises Equations Versus Expressions For Exercises 1–20, identify each exercise as an expression or an equation.Then simplify the expressions and solve the equations. 1. 4x 2 6 8x 2. 3y 3 4y 8 3. 7b 1 2b 4 1012x 32 41a 82 815 x2 10t 2 2 7t 712a 12 4. 5. 6. 213x 42 415x 12 1513 2y2 8x 7 712 w2 21 2y 5w 8 7. 8. 9. 10. 11. 12. 13. 14. 20x 8 7x 28 27x 9 7 8w 12 3w 8 5w 15. 16. 17. 0.12512p 82 0.45k 1.67 0.89 1.456k 0.251p 42 18. 19. 20. 0.5u 1.2 0.74u 0.8 0.24u 0.4 0.29c 4.495 0.12c 4 5 3z 1 2 z 1 5 6 y 7 8 1 2 y 3 4 7 8 t 4 3 u 5 4 t 11 6 u 1 2 v 3 5 2 3 v 7 10 612 3a2 218a 32 12a 19
miller_intermediate_algebra_4e_ch1_3
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