Algebra Demystified 2nd Ed
326 algebra De mystif ieD The administrator should invest at least $136,363.64 in the corpo- rate bond in order to receive at le ...
Chapter 9 linear inequaliTieS 327 Let x = number of tee shirts sold per month 18 x = revenue 1500 + 8x = overhead costs + prod ...
328 algebra De mystif ieD Let x = number of times Sharon uses her skates The cost to rent skates is 3x. 60 3 60 3 20 20 ( ) & ...
Chapter 9 linear inequaliTieS 329 The sales clerk would need an annual sales level of $125,000 or more in order for the salary p ...
330 algebra De mystif ieD EXAMPLE 37 < ≤ x (, 37 ] –≤ 41 ≤x – [–4, –1] –8 < <x 8 (–8, 8) 0 ≤ x < 21 [, 0 ) ...
Chapter 9 linear inequaliTieS 331 Because we want to solve for x, we divide all three quantities by 2. 42 12 4 2 2 2 12 2 2626 ≤ ...
332 algebra De mystif ieD Solve the double inequality and give the solution in interval notation. 16 < 4(2x - 1) ≤ 20 ( ) 16 ...
Chapter 9 linear inequaliTieS 333 We begin by “clearing the fraction,” so we multiply each quantity by 4. 2 51 4 6 42 4 1 51 4 4 ...
334 algebra De mystif ieD 2. [, ] 5318 111 63 9 6 3 3 3 9 3 2323 ≤-≤ +++ ≤≤ ≤≤ ≤≤ x x x x 3. , -≤ -≤ +++ ≤≤ ≤≤ ≤≤ 23 45 4 ...
Chapter 9 linear inequaliTieS 335 -<-+< -<-<- >- >- 1611 1 11 11 11 12 610 12 6 6 6 1 x x x 00 6 ...
336 algebra De mystif ieD Applications of Double Inequalities Before we work with applied problems, we need to learn how to solv ...
Chapter 9 linear inequaliTieS 337 If 0 < y < 4, the corresponding interval for x can be found by solving 0 < 3 – x < ...
338 algebra De mystif ieD yxy x x =- ≤≤ ≤- ≤ -- - -≤-≤ ≥- 72 410 47210 77 7 323 3 2 2 2 xx xx ≥ ≥≥--≤≤ 3 2 3 2 3 2 ...
Chapter 9 linear inequaliTieS 339 We use double inequalities to solve word problems where the solution is a limited range of val ...
340 algebra De mystif ieD The manufacturing plant should produce between 10,000 and 25,000 gross per month to keep its monthly c ...
Chapter 9 linear inequaliTieS 341 523 9 5 ≤≤F and FC=+ 32. 5 9 5 32 23 32 32 32 27 9 5 9 5 9 27 1 5 9 9 5 ≤+≤ --- -≤ ≤- ⋅- ≤⋅ ...
342 algebra De mystif ieD Let x represent the number of minutes the call lasts. Let c = 2.10 + 0.50x represent the total cost o ...
Chapter 9 linear inequaliTieS 343 • Solve linear inequalities. We solve a linear inequality in much the same way we solve a li ...
344 algebra De mystif ieD • Solve applications with inequalities. The applications in this section are the inequality version ...
Chapter 9 linear inequaliTieS 345 Quiz The solution to 56 xx + > 87 – is a. x<^1 6 b. x>- 1 C. x<- 1 D. x>^ ...
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