Algebra Demystified 2nd Ed
306 algebra De mystif ieD Summary In this chapter, we learned how to: • Solve percent problems. If we increase x by p × 100% ( ...
Chapter 8 linear appliCaTionS 307 the amount of the total concentration, the amount of the second concen- tration is “Amount of ...
308 algebra De mystif ieD algebra DeMYSTiFieD / gibilisco / 000-0 / Chapter 8 Quiz How much 9% acid solution should be mixed wi ...
Chapter 8 linear appliCaTionS 309 A pair of boots is on sale for $112, which is 30% off the original price. What is the origina ...
310 algebra De mystif ieD A school district’s printing services department owns two printing presses. The department must produ ...
311 chapter 9 Linear Inequalities Because linear inequalities are similar to linear equations, many of the problems in this chap ...
312 algebra De mystif ieD Inequalities and the Number Line The solution to an algebraic inequality usually consists of a range ( ...
Chapter 9 linear inequaliTieS 313 Before we solve inequalities, we will learn how to shade the region on the number line represe ...
314 algebra De mystif ieD ✔SOLUTIONS x > 4 FIgure 9-9 4 x > –5 FIgure 9-10 –5 x ≤ 1 FIgure 9-11 1 x < –3 FIgure ...
Chapter 9 linear inequaliTieS 315 EXAMPLE Solve the inequality. 2 x – 7 > 5x + 2 We begin by collecting terms with x in them ...
316 algebra De mystif ieD PRACTICE Solve the inequality and graph the solution on the number line. 7x- 4 ≤ 2 x+ 8 2.^2 3 ( 69 ...
Chapter 9 linear inequaliTieS 317 02 51012 02 11012 02 012 012 02 .( ). .. .. . . x x x x x -+≥ -+≥ ≥ ≥ ≥≥ ≥ 3 5 x 06. 0 FIgur ...
318 algebra De mystif ieD 312177 332277 5577 55 5 ()()xxx xxx xx x -+ -≤ + -+ -≤ + -≤ + ++ ≤≤+ -- -≤ ≥ ≥- 712 77 212 2 ...
Chapter 9 linear inequaliTieS 319 EXAMPLE x < 3 (–Ç, 3) x > –6 (–6, Ç) x ≤ 100 (–Ç, 100] x≥ 4 [4, Ç) The relationship betw ...
320 algebra De mystif ieD ✔SOLUTIONS x ≥ 5 [5, Ç) x < 1 (–Ç, 1) x ≤ 4 (–Ç, 4] x ≥ –10 [–10, Ç) x ≤ –2 (Ç, –2] x > 9 (9, Ç ...
Chapter 9 linear inequaliTieS 321 Some word problems give two alternatives and ask for what interval of the variable is one alte ...
322 algebra De mystif ieD The plant should produce and sell more than 50,000 CDs per month in order to make a profit. Mary inher ...
Chapter 9 linear inequaliTieS 323 Let x = number of hours per year the equipment is used The monthly purchase costs amount to 12 ...
324 algebra De mystif ieD the year would be 0.0575x. The total income from Bank B would be 25 + 0.0575x. IncomefromBankAI≥ncomef ...
Chapter 9 linear inequaliTieS 325 A company providing cell phone service has two plans. The monthly charge on one plan is $75 w ...
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