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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve. 1) 1) The line graph shows the percentage of high school seniors who used alcohol or marijuana in a certain state. 1985 […]

Perform the indicated subtraction. 46) 46) 0.82 – (–0.13) A) 0.1066 B) 0.69 C) 0.95 D) 1.05 Evaluate the algebraic expression for the given value(s). 47) 10x +20 5x , given 4 47) A) 40 B) 3 C) 2 D) […]

Rewrite the expression with a rational exponent. 51) 49x7y 51) A) 1 4· (9x7y) B) (9x7y)4 C) 1 (9x7y)4 D) (9x7y)1/4 Use radical notation to rewrite the expression. Simplify, if possible. 52) (–64)1/3 52) A) –4 B) 4 C) –4316 […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Find the domain of the square root function. Then use the domain to choose the correct graph of the function. 1) f(x) =12 […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Match the graph with its function using the x–intercepts. 1) 1) A) f(x) =x1/2 + 2×1/4 + 1 B) f(x) =x1/2 +14×1/4 –15 […]

Solve the equation by the method of your choice. Simplify solutions, if possible. 87) (2x + 5)2=5 87) A) –5, 0 B) –5±5 2 C) 5±5 2 D) –5 2± i 5 2 Solve. 88) 88) A ladder that is […]

Solve the polynomial inequality and graph the solution set on a number line. 50) x3– 9×2+ 23x – 15  0 50) A) [–5, –3]  [–1, ) B) [1, 3]  [5, ) C) ( , 1]  [5, […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. The graph of an exponential function is given. Select the function for the graph from the functions listed. 1) 1) A) f(x) =4x– […]

A) B) C) D) Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions. 52) 52) log x + log 15 A) log x 15 […]

116) f(x) =4x 116) A) B) C) D) Answer: C Explanation: A) B) C) D) 41 Solve the problem. 117) 117) A sample of 700 g of lead–210 decays to polonium–210 according to the function given by A(t) =700e–0.032t, where […]

Determine whether the values in the table belong to an exponential function, a logarithmic function, a linear function, or a quadratic function. 158) 158) x y 0 1 1 4 216 364 4256 A) linear B) quadratic C) logarithmic D) […]

A) B) C) D) Solve the system. 142) 4×2– 2y2= – 16 5×2+ 3y2=68 142) A) {(2, 4), (4, 2), (–2, –4), (–4, –2)} B) {(2, –4), (2, 4)} C) {(–2, –4), (–4, –2)} D) {(2, 4), (–2, 4), (2, […]

A) Axis of symmetry is y = – 7. B) Axis of symmetry is x =7. C) Axis of symmetry is y =7. D) Axis of symmetry is x = – 7. 34) x =(y – 8)2– 7 34) 21 […]

104) y2 64 –x2 4= 1 104) A) B) C) D) Answer: B Explanation: A) B) C) D) 61 Let x represent one number and let y represent the other number. Use the given conditions to write a system of […]

Write the standard form of the equation of the circle with the given center and radius. 71) 71) Center (–2, 0), r =10 A) (x – 2)2+ y2=100 B) x2+ (y + 2)2=10 C) x2+ (y – 2)2=10 D) (x […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Match the equation to its graph. 1) y2 9–x2 4= 1 1) A) B) C) D) Answer: B Explanation: A) B) C) D) […]

141)  4 i = 1 –1 3 i 141) A) 20 81 B) –16 81 C) –20 81 D) 40 81 Find the indicated sum. Use the formula for the sum of the first n terms of a geometric […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Use the partial sum formula to find the partial sum of the given arithmetic sequence. 1) 1) Find the sum of the first […]

Use the Binomial Theorem to expand the binomial and express the result in simplified form. 74) (x – 8)5 74) A) x5– 40×4+ 640×3– 5120×2+ 20,480x – 8 B) x5– 40×4+ 640×3– 5120×2+ 20,480x – 32,768 C) x5– 40×4+ 1280×3– […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Find the mode for the group of data items. If there is no mode, so state. 1) 1) 5, 9, 75, 3, 2, […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the inequality and graph the solution set on a number line. 1) y 4–2 1) A) [–8, ) B) (–8, ) C) […]

Solve the equation. 54) 54) 4(5x + 1) + 23 =14x – 3 A) {–5} B) {–30} C) {5} D) {–180} Solve the problem. 55) The time it takes to travel a given distance at constant speed is given by […]

Determine whether the equation in one variable is linear. 87) 6 x –3= 0 87) A) linear B) not linear Use the percent formula, A = PB: A is P percent of B, to solve. 88) 88) 27% of what […]

Give the ordered pairs that correspond to the points labeled in the figure. 43) 43) A) R = (–5, 3), S = (–3, –5) B) R = (–5, 3), S = (–5, –3) C) R = (3, 6), S = […]

C) D) Graph the linear equation using the slope and y–intercept. 77) y = – 1 3x +2 77) A) B) 36 Answer: D Explanation: A) B) C) D) C) D) Solve. 78) 78) The approach ramp used by a […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Graph the linear equation in two variables. 1) 1) y = – 3x – 3 A) B) C) D) Answer: D Explanation: A) […]

Determine if the given ordered triple is a solution of the system. 92) 92) (5, –1, 1) x + y + z =5 x – y + 4z =10 5x + y + z =25 A) not a solution B) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1) 1) An electronics company kept comparative statistics on two products, A and B. For the years 2003 to 2011, […]

Solve the system. If there is no solution or if the system‘s equations are dependent, so state. 57) x–y+2z =5 4x +z=0 x+4y +z= – 20 57) A) {(0, –5, 0)} B) infinitely many solutions; dependent equations C) {(0, 0, […]

Provide an appropriate response. 55) 55) Write a polynomial in descending powers of x that represents the area of the entire figure. 2x 3 2x + 1 3 A) 4×2+12x +11 B) 8x +14 C) 16×2+56x +48 D) 4×2+14x +12 […]

Exam Name___________________________________ SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Determine the coefficient of each term, the degree of each term, and the degree of the polynomial. 1) –15x4y3– 3x3y +3 8xy […]

Solve the problem. 54) 54) Find a formula for the area of the shaded grey region and express it in factored form. 7x 7x 1 1 A) (x +7)(x –7) B) 7x – 1 C) (7x + 1)(7x – 1) […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Factor. 1) 3×2+ 11x – 20 1) A) (3x – 4)(x + 5) B) (3x – 5)(x + 4) C) (3x + 5)(x […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1) 1) The average speed on a round–trip commute having a one–way distance d is given by the complex rational […]

Solve. 55) Young’s rule, C =DA A + 12 , can be used to approximate the dosage of a drug prescribed for children. In this formula, A = child’s age in years, D = an adult dosage, and C = […]

Exam Name___________________________________ SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Provide an appropriate response. 1) 1) A function f models the percentage of attendance at weekly welfare–to–work meetings as a function of […]

Find the inverse of the one–to–one function. 51) 51) f(x) = – 5x + 4 A) f–1(x) =y – 4 –5 B) f–1(x) =x + 4 –5 C) f–1(x) = –5x – 4 –5 D) f–1(x) =x – 4 –5 […]

A) B) C) D) 98) 98) x – y –6 58 Answer: A Explanation: A) B) C) D) A) B) C) D) Answer: C Explanation: A) B) C) D) 59 Solve and graph the solution set on a number line. […]

Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Graph the solution set of the system of inequalities or indicate that the system has no solution. 1) x  0 y  […]

31) 31) x<1 A) (–, –1]  [1, ) B) (–, –1)  (1, ) C) (–1, 1) D) [–1, 1] Solve the problem. 32) 32) Given the cost function, C(x), and the revenue function, R(x), write the profit function […]

Find the union of the sets. 67) 67) {w, x, y, z, k}   A)  B) {w, x, y, z, k} C) {w} D) {y, k} Solve and graph the solution set on a number line. 68) 68) […]

Release to Production — Print Supplement Supplement Information ISBN 0-13-418066-6 / 978-0-13-418066-3 Title Instructor’s Solutions Manual for INTRODUCTORY AND INTERMEDIATE ALGEBRA FOR COLLEGE STUDENTS Schedule RTP date 3/1/16 File-out date 3/8/16 Bound book date NA THIS MANUAL IS ONLINE ONLY […]

Chapter 1 Variables, Real Numbers, and Mathematical Models 54. 00 8  55. 7 0 is undefined. 56. 8 0  is undefined. 57. 1 15 3 15 5 3  58. 1 80 8 80 10 8  59. […]

Chapter 1 Variables, Real Numbers, and Mathematical Models 1.1 Check Points 1. a. 62 62(10) 26x  b. 2( 6) 2(10 6) 32x  2. a. 7 2 7 3 2 8 21 16 37xy b. 663810 2 2828385 xy […]

Section 1.4 Basic Rules of Algebra 95. a. b. Rhode Island, Georgia, Louisiana, Florida, Hawaii 96. a. b. Wyoming, Wisconsin, Washington, West Virginia, Virginia 121. 12 3.464  and should be graphed between -4 and -3. 122. 12 0.414  […]

Section 10.3 Multiplying and Simplifying Radical Expressions 10.3 Exercise Set 1. 35 35 15 2. 75 35 3. 333 3 29 29 18 4. 3 33 54 20 5. 44 4 4 11 3 11 3 33  6. 55 […]

Chapter 10 Radicals, Radical Functions, and Rational Exponents 10.1 Check Points 1. a. 64 8because 2 864 b. 49 7because 2 (7) 49 c. 16 4 25 5 because 2 416 525    d. 0.0081 0.09because 2 0.09 […]

Section 10.7 Complex Numbers 141.  2 44 23 62 3 ii iii      22 44 6161 47 284 77 7 28 4 28 4 49 1 50 28 4 14 2 50 50 25 25 […]

Section 10.5 Multiplying with More Than One Term and Rationalizing Denominators 19.     2735 23 25 73 75 6102135      20.     3 2 10 11 30 33 20 22 […]

Section 10.6 Radical Equations 45. 232 l t π  2 2 2 2 2 2 22 22 232 32 4 32 4 88 or tl tl tl tt ll π π π ππ       […]

Section 11.3 Quadratic Functions and Their Graphs The x–intercepts are 1 and 3. Set x = 0 and solve for y to obtain the y–intercept.  2 01 4 3y     2 224215. 2 b ff a […]

Section 11.5 Polynomial and Rational Inequalities 61. 2 23612 xx   Express the inequality without the absolute value symbol. 22 22 2 36 12 or 2 36 12 2240 2480 xx xx xx xx     Solve […]

Mid-Chapter Check Point 11. 2 2 (2 3) 4 23 4 2340 xx  Apply the quadratic formula. 2 3 4ab c 2 (3) (3) 4(2)(4) 2(2) 39323 23 44 323(1) 3233 23 4444 x ii     […]

Section 11.4 Equations Quadratic in Form 53.  21 32 42 10xx   Using a graphing utility we find the solution set is   3, 5 . Both solutions check. 54. 42 10 9 0xx Using a graphing […]

Section 11.5 Polynomial and Rational Inequalities 26. 2 2 3105 31050 xx xx   Solve the related quadratic equation. 2 31050xx 2 2 4 2 ( 10) ( 10) 4(3)(5) 2(3) 510 3 0.61 or 2.72 bb ac xa […]

Chapter 11 Quadratic Equations and Functions 11.1 Check Points 1. 2 2 428 7 x x   Apply the square root property. 7x The solution set is   7. The coefficient of the x–term is 10. Half of […]

Section 11.2 The Quadratic Formula 143. 42 8150xx Let u = 2 x   2 22 2 8150 8150 530 xx uu uu    Apply the zero product principle. 50 30 53 uu uu    […]

Chapter 11 Review Exercises 34. a. 2 ( ) 0.125 2.3 27gx x x  2 (35) 0.125(35) 2.3(35) 27 261g  On wet pavement, a motorcycle traveling at 35 miles per hour will require a stopping distance of 261 […]

Chapter 11 Test 18.  2 14fx x  Since 1a is positive, the parabola opens upward. The vertex of the parabola is     ,1,4hk  and the axis of symmetry is 1.x Replace   fx […]

Section 12.4 Exponential and Logarithmic Equations 37.  2ln7 ln410 ln 410 2ln 7 ln 410 21.09 ln 7 x x x    The solution set is ln 410 21.09 ln 7     .  […]

Chapter 12 Exponential and Logarithmic Functions 12.1 Check Points 1. 3 (3) 42.2(1.56) 160.20876 160 f  The average amount spent after three hours at a mall is $160. This overestimates the amount shown in the figure by $11.  […]

Section 12.2 Logarithmic Functions 102.       ln ln 3fx x gx x The graph of g is the graph of f shifted 3 units to the left. After approximately 9 months, the average score 103. […]

Section 12.5 Exponential Growth and Decay; Modeling Data 29. First find the decay equation. 22 22 0.031507 ln 0.5 22 ln 0.5 22 0.031507 t k k k Ae      Next use the decay equation answer […]

Chapter 12 Exponential and Logarithmic Functions 71.  33.4 1.66 t ft    421 1.66 33.4 421 ln ln 1.66 33.4 421 ln ln1.66 33.4 421 ln 33.4 5 ln1.66 t t t t     […]

Chapter 13 Review Exercises Back-substitute 0 and 5 2 for x to find y. 5 0or 2 11 01 51 12 7 2 yx yx yy y y =− − =− − =− − =− − =− =− The solution […]

Section 13.5 Systems of Nonlinear Equations in Two Variables 3. 2 2 44 xy yx x += =−+ Substitute 2 4 4 for xx y −+ in the first equation and solve for x. ()() 2 2 342 320 210 […]

Chapter 13 Conic Sections and Systems of Nonlinear Equations 13.1 Check Points 1.   22 2 22 004 16 xy xy   2.    22 2 22 2 22 5(6)10 5 6 100 xh yk r […]

Section 13.4 The Parabola: Identifying Conic Sections 3. a. Collect 22 and termsxy on the same side of the equation. 22 22 416 416 xy xy   Because 22 and xy have opposite signs, the equation’s graph is a […]

Section 13.2 The Ellipse 46. 222 222 50 30 cab c   2 2500 900c 2 1600 40 c c   The people should stand along the major axis 40 feet from the center of the room.  […]

Chapter 13 Review Exercises 80. Rewrite the first equation. 2 log 3 2log 3 xy xy =+ =+ Substitute 1 for logyx−in the first equation and solve for y. () 2log 3 21 3 22 3 23 5 xy yy […]

Chapter 14 Sequences, Series, and the Binomial Theorem 14.1 Check Points 1. a. 1 2 3 4 2(2) 5 9 2(3) 5 11 2(4) 5 13 a a a    The first four terms are 7, 9, 11, […]

Section 14.4 The Binomial Theorem 10.   32 3! 3! 3! 3! 41664 0! 3 0 ! 1! 3 1 ! 2! 3 2 ! 3! 3 3 ! 3! xx x       13! […]

Section 14.3 Geometric Sequences and Series 93. 2 1 22 1 a a   3 2 42 2 a a  4 3 82 4 a a   5 4 16 2 8 a a  The ratio […]

Chapter 14 Review Exercises 16.      20 220 20 220 20 20 220 400 180 n a    200 1 20 200 20 20 n an n   17.  1 12 1 […]

Chapter 2 Linear Equations and Inequalities in One Variable 109. Let x = number of miles driven. 80 0.25 400 80 0.25 80 400 80 0.25 320 0.25 320 0.25 0.25 1280 x x x x     […]

Chapter 2 Linear Equations and Inequalities in One Variable 2.1 Check Points 1. 512 55125 017 17 x  Check: 512 17 5 12 12 12 x   The solution set is   17 . 13 y  […]

Section 2.6 Problem Solving in Geometry 32. The sum of the measures of the three angles of a triangle is 180°.   3 40 180 5 40 180 5140 28 384 40 68 x x x x x  […]

Section 2.4 Formulas and Percents 23.  1 for 2 A ha b b   1 22 2 2 2 2 2 2 22 or Ahahb Aha hahbha Aha hb Aha hb hh Aha A bb a hh  […]

Section 2.2 The Multiplication Property of Equality 72. a. The bar graph indicates the median weekly earnings, in 2013, for women with some college or an associate’s degree is $657. Since 2013 is 33 years after 1980, substitute 33 into […]

Chapter 3 Linear Equations in Two Variables 3.1 Check Points 1. 2. (4,2)E (2,0)F (6,0)G 3. a. 39 33(2) 9 36 9 99, true xy    (3, 2) is a solution.    02(0)220,2 12(1)201,0 22(2)222,2 y […]

Section 3.2 Graphing Linear Equations Using Intercepts 39. 23 11xy x-intercept: 11 2  y-intercept: 11 3 checkpoint: (−1, 3) Draw a line through 11 11 ,0 , 0, , 23     and (−1,3). (3,4). Plot these […]

Chapter 3 Linear Equations in Two Variables 63. First we need to find the equation of the line with x−intercept of 2 and y− intercept of 4.− This line will pass through () 2, 0 and () 0, 4 .− […]

Section 3.4 The Slope-Intercept Form of the Equation of a Line 63. If the line rises from left to right, it has a positive slope. It passes through the origin, (0, 0) and a second point with equal x– and […]

Mid-Chapter Check Point 6. 1 3 621 y x xy   Substitute 1 3 y for x in the second equation and solve for y. 621 61 21 3 26 21 3621 327 9 yy yy y y y […]

Section 4.5 Systems of Linear Equations in Three Variables 44. Let x = the number of $2 packages sold. Let y = the number of $3 packages sold. Let z = the number of $4 packages sold. 12 612 24162 […]

Section 4.5 Systems of Linear Equations in Three Variables 4.5 Check Points 1. Test the ordered triple in each equation. 2 3 22 ( 1) 2 ( 4) 3 (5) 22 22 22, true xyz−+= −− −+ = = 23 […]

Chapter 4 Review Exercises 49. Principal Rate = Interest 8% Investment 0.08 0.08 10% Investment 0.10 0.10 xx yy × Since the total investment is $10,000 the first equation is 10,000.xy+= Since the total interest is $940, the second equation […]

Section 4.2 Solving Systems of Linear Equations by the Substitution Method 39. 0.7 0.1 0.6 0.8 0.3 0.8 xy xy   Multiply both sides of both equations by 10. 76 83 8 xy xy   Solve the first […]

Chapter 4 Systems of Linear Equations 4.1 Check Points 1. a. To determine if (1,2) is a solution to the system, replace x with 1 and y with 2 in both equations. 23 4 2(1) 3(2) 4 26 4 44,true […]

Chapter 5 Exponents and Polynomials 5.1 Check Points 1. 32 32 32 32 3322 32 11 16 7 3 11 3 5 15 54820 xxxxxx xxx =− + + − − + − − =+−− 2. 32 32 32 11 […]

Section 5.6 Long Division of Polynomials; Synthetic Division 70. First, compute the difference: ()( ) 32 32 32 42 12 25 2334 xxx xxx xxx +−−− −+− =+−+ Now, complete the division: 32 2334 2 xxx x +−+ + 2 […]

Section 5.3 Special Products b. Since this product is of the form ()() A BAB+− , use the special-product formula 22 ()()ABAB A B+−=− .   first term second term squared squared 22 2 (4 5)(4 5) (4 ) […]

Mid-Chapter Check Point 3. ()( ) 2 2 12 21 20 35 12 35 xxx xx =−+− =−− 4. ()( ) ()( ) 35 47 35 47 12 xx xx x +− − =++−+ =− + ()( ) ()( ) […]

Chapter 5 Review Exercises 10. () 2 2 7 9 2 427 xx xx −+ −−− To subtract, add the opposite of the polynomial being subtracted. 2 2 2 792 427 379 xx xx xx −+ −++ −+ () () […]

Section 6.3 Factoring Trinomials Whose Leading Coefficient is Not 1 92. a. ()() 2 35231 2xx x x+−= − + b. ()() () () [][] ()() 2 31512 311 12 331 12 32 3 yy yy yy yy ++ +− […]

Chapter 6 Factoring Polynomials 106. 2 4yx x=− To match this equation with its graph, find the intercepts. To find the y−intercept, let 0x=and solve for .y () 2 0400y=− = The y–intercept is 0, which means that the graph […]

Chapter 6 Factoring Polynomials 6.1 Check Points 1. a. 32 22 18 3 6 15 3 5 xxx xx =⋅ =⋅ The GCF is 2 3.x b. 22 422 32 20 4 ( 5) 12 4 3 40 4 10 […]

Section 6.6 Solving Quadratic Equations by Factoring 9. ()() 2 8150 530 xx xx ++= ++= 5 0 or 3 0 5 3 xx xx += += =− =− Check −5: () () 2 2 8150 585150 25 40 15 […]

Section 7.5 Complex Rational Expressions 34. 1 2 1 12 x x − −− LCD = 2x− () () () 1 211 2 121 3 21 2 xx xx xx  − −  == −− −  −−  […]

Chapter 7 Review Exercises 46. 11 2 2 22 2 2 122 36 66 6 263 22 xx xxxx xxx x xxx − −− == − −− − =⋅= − 49. 311 44xx =+ The restriction is 0.x≠ The LCD […]

Section 7.4 Adding and Subtracting Rational Expressions with Different Denominators 68. 4 75 y y −+ LCD = 5y+ () () 75 44 7555 754 5 7354 5 335 5 y yy yyy yy y yy y y y + […]

Chapter 7 Rational Expressions 7.1 Check Points 1. a. 728 840 x x − − Set the denominator equal to 0 and solve for x. 8400 840 5 x x x −= = = The rational expression is undefined for […]

Section 7.6 Solving Rational Equations 49. 11 1 pq f += () () 11 fpq fpq pq pq fq fp pq fq p pq fq p pq qp qp pq fqp   +=     += += […]

Section 7.7 Applications Using Rational Equations and Proportions 18. Let x = the maintenance bill on a store that is 4800 square feet. 22 $45,000 $ 180,000 ft 4800 ft 45,000 180,000 4800 1 4 4800 44800 1200 x x […]

Section 7.3 Adding and Subtracting Rational Expressions with the Same Denominator 9. 813217 99 9 3xx xx +== 10. 41115 5 99 9 3xx xx +== 11. 549 33 3xx x += ++ + 12. 81018 66 6xx x += […]

Section 8.4 Composite and Inverse Functions 4. a. ()() () () () () 34 53 4 2 15 20 2 15 18 xx =−+=− b. ()() () () () () 52 35 2 4 15 6 4 15 2 gf […]

Chapter 8 Basics of Functions 8.1 Check Points 1. The domain is the set of all first components. The domain is {0, 10, 20, 30, 40}. The range is the set of all second components. The range is {9.1, 6.7, […]

Chapter 9 Inequalities and Problem Solving 37. 234 10 23 14 x x   There are no values of x for which the absolute value of 23x is a negative number. By definition, absolute values are always positive. The […]

Section 9.2 Compound Inequalities 88. makes sense 89. makes sense 90. makes sense 91. makes sense 92. true 2 2 25 34 59 xxx xx      2 11519 gf 93. false; Changes to make the statement […]

Chapter 9 Inequalities and Problem Solving 9.1 Check Points 1. 4323 420 5 x x     5, b. () 80 R xx c. () () () ( ) 80 (300,000 30 ) 80 300,000 30 50 300,000 […]

Section 9.4 Llnear Inequalities In Two Variables 11. 1 3 yx  Replacing the inequality symbol with an equal sign, we have 1. 3 yx  Since the equation is in slope- intercept form, use the slope and the intercept […]