6. 4 : 5 is in simplest form because 4 and 5 have no. common factors. 4 : : 5 3. and 7 : : 14 2

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1 9. Let the number of balloons be. Total cost of balloons: $(.0) Cost of banner: $ Total ependiture of committee: $(.0 ) The most the committee can spend is $: The can bu at most balloons. 0. Let the number of uniforms be. Cost of deliver: $.0 Cost of uniforms: $(9) Total cost to order the uniforms: $(9.0) The most the coach can spend is $7: He can order at most uniforms. Chapter Quic Chec. Number of speaers : Number of sets of earbuds 0 : 0 : : 9. Number of headphones : Number of speaers 0 : : 0 0 :. 9 : 9 : : 9 : and : are equivalent ratios.. : : : : and are not equivalent ratios.. : : 9 : : and 9 : are equivalent ratios.. : is in simplest form because and have no 7. common factors. : : : 0 : : : : 0 and : are two ratios equivalent to :. is not in simplest form because and have a common factor of and 0 are two ratios equivalent to to is not in simplest form because 7 and have a common factor of 7. 7 : 7 7 : 7 : 7 : 7 : : : and : are two ratios equivalent to 7 :. 9. Average speed Total distance traveled Total time, m 9h. m/h 0. Store A: $.0 for oz of walnuts. Unit price of walnuts at Store A: $ 0. $0.0/oz Store B: $.0 for 0 oz of walnuts. Unit price of walnuts at Store B: $ 0. $0./oz 0 $0.0/oz $0./oz; The walnuts cost less at Store A.. Store C: $. for lb of potatoes. Unit price of potatoes at Store C: $. $0.7/lb Store D: $. for lb of potatoes. Unit price of potatoes at Store D: $. $0.7/lb $0.7/lb $0.7/lb; The potatoes cost less at Store D. 7 Solutions Ke Course

2 . P(, ), Q(, ), R(, ), S(, ), T(, ). beads (%).? beads (00%) From the bar model, % % 00% 00 0 There are 0 beads altogether. $7 (00%)? (0%) From the bar model, 00% 7 % % She paid a total of $7.0. Lesson. Hands-On Activit (Identif Direct Proportion in an Eperiment) Step Answers var. Step Answers var. Step Answers var. Math Journal: H increases as L increases. The value of H L remains constant for all pairs of values of H and L. So, H is directl proportional to L. Guided Practice. For each pair of values, and : mi h mi h mi h 00 0 So, the distance traveled b the school bus is directl proportional to the number of hours it has traveled. The constant of proportionalit is 0 and represents the speed of the bus. The direct proportion equation is 0.. For each pair of values, and : pitches inning 0 pitches inning 0 pitches inning So, the number of pitches made is not directl proportional to the number of innings of a baseball game Because the original equation 0. can be rewritten as an equivalent equation in the form, it represents a direct proportion. The constant of proportionalit is... Because the original equation cannot be rewritten as an equivalent equation in the form, it does not represent a direct proportion.. Constant of proportionalit: baseballs da The constant of proportionalit is and represents the dail production rate of baseballs. The direct proportion equation is.. Answers var. Sample: Let be the number of sandwiches. Let be the amount Jason pas. Cost per sandwich: $ per sandwich The direct proportion equation is. 7. Constant of proportionalit: q p The constant of proportionalit is. The direct proportion equation is q p.. Constant of proportionalit: w h The constant of proportionalit is. The direct proportional equation is w h. Solutions Ke Course 77

3 Practice.. For each pair of values, and : 0 So, is directl proportional to. The constant of proportionalit is. The direct proportion equation is.. For each pair of values, and : So, is not directl proportional to.. For each pair of values, and : So, is not directl proportional to.. For each pair of values, and : So, is directl proportional to. The constant of proportionalit is. The direct proportion equation is.. Because the original equation can be rewritten as an equivalent equation in the form, it represents a direct proportion. The constant of proportionalit is.. ( ) ( ) Because the original equation cannot be rewritten as an equivalent equation in the form, it does not represent a direct proportion. 7. p 0.q Because the original equation is written in the form, it represents a direct proportion. The constant of proportionalit is 0....a b 0.a 0 (b ) a 0b 0 a 0b 0 ( ) Because the original equation.a b cannot be rewritten as an equivalent equation in 7 Solutions Ke Course the form, it does not represent a direct proportion. 9. For each pair of values, n and d: 0 mi 0 gal 0 mi 0 gal 0 mi 0 gal So, d is directl proportional to n. The constant of proportionalit is 0 and represents the distance traveled, in miles per gallon of gasoline. The direct proportion equation is d 0n. 0. For each pair of values, and : games point games points 0 games points So, is not directl proportional to.. For each pair of values, and : 0 balls 0 machine 0 balls 0 machines 00 balls 0 machines So, is directl proportional to. The constant of proportionalit is 0 and represents the number of tennis balls produced per machine. The direct proportion equation is 0.. Math Journal: You can tell whether two quantities are in direct proportion b checing whether the two quantities increase or decrease b the same factor. In other words, ou can chec if is a constant value.. Math Journal: P c P c c c P c Yes. Because P c direct proportion.. Constant of proportionalit: d t is a constant value, P and c are in 0 0 The constant of proportionalit is 0. The direct proportion equation is d 0t.. Constant of proportionalit: w t The constant of proportionalit is. The direct proportion equation is w t.

4 . Constant of proportionalit: 0 The direct proportion equation is. 7. Constant of proportionalit: The direct proportion equation is.. Answers var. Sample: Let t be the time Karl taes to hie. Let d be the distance he hies. Distance hied per minute: d mi mi mi/min t min min The constant of proportionalit is. The direct proportion equation is d t. 9. Answers var. Sample: Let n be the number of songs Paul downloads. Let P be the amount he pas. $ P $ 0 Cost per song: n songs songs The constant of proportionalit is. The direct proportion equation is P n. 0. Math Journal: Sample: The cost per da of placing an advertisement for the first das is the same in both tables: $0 per da. The are different because, for the Dail Post, C is a constant value for all pairs of values. But t for the Evening Star, C is not a constant value. t So, the total cost of an advertisement is directl proportional to the number of das for the Dail Post but not for the Evening Star. Lesson. Guided Practice. The graph is a straight line through the origin, and does not lie along the - or -ais. So, it represents a direct proportion. Because the graph passes through (, 0), the constant of proportionalit is 0. The direct proportion equation is 0.. Although the graph is a straight line that does not lie along the - or -ais, it does not pass through the origin. So, the graph does not represent a direct proportion.. Although the graph passes through the origin and does not lie along the - or -ais, it is not a straight line. So, it does not represent a direct proportion.. a) Constant of proportionalit: 0 mi 0 h The constant of proportionalit is 0. So, Ms. Gra s driving speed is 0 miles per hour. b) The direct proportion equation is 0t. c) It means that Ms. Gra travels 0 miles in 7 hours. d) From graph, the distance traveled is 0 miles. e) From graph, it taes her hours to travel Practice. 00 miles.. Although the graph is a straight line and does not lie along the - or -ais, it does not pass through the origin. So, it does not represent a direct proportion.. The graph is a straight line through the origin, and it does not lie along the - or -ais. So, it represents a direct proportion. Because the graph passes through (, 00), the constant of proportionalit is 00. The direct proportion equation is 00.. Although the graph is a straight line that does not lie along the - or -ais, it does not pass through the origin. So, it does not represent a direct proportion.. The graph is a straight line through the origin, and it does not lie along the - or -ais. So, it represents a direct proportion. Because the graph passes through (, 00), the constant of proportionalit is 00. The direct proportion equation is 00.. a) Constant of proportionalit: 0 0 The constant of proportionalit is 0 and represents the cost of staing at a motel per night. b) wee 7 das From the graph, it costs $0 to sta at a motel for a wee.. Math Journal: First ou observe whether it is a straight line. Then ou chec whether it passes through the origin. Finall, ou mae sure that it does not lie along the - or -ais. 7. a) Yes, the amount of pesos is directl proportional to the amount of U.S. dollars because the graph is a straight line through the origin and does not lie along the - or -ais. Solutions Ke Course 79

5 . b) From the graph, ou get pesos for U.S. dollars. c) From the graph, ou get U.S. dollars for pesos. d) The echange rate is U.S. dollar for pesos. e) Constant of proportionalit: The direct proportion equation is. Number of Ceramic Pots Ceramic Pots Production Number of Das a) The graph is a straight line through the origin, and it does not lie along the - or -ais. So, it represents a direct proportion. Constant of proportionalit: The constant of proportionalit is and represents dail production rate of ceramic pots. b) The direct proportion equation is. It means Beth maes 0 ceramic pots in das. c) From the graph, Beth can mae pots in das. d) From the graph, Beth will tae at least das Lesson. to mae 0 pots. Guided Practice. Method Let be the number of hours it taes to mae 0 cars. 0 cars 0 cars hours hours , It taes 7. hours to mae 0 cars. 0 Solutions Ke Course Method Let be the number of hours. Let be the number of cars. Constant of proportionalit: 0 Direct proportion equation: When 0 and, It taes 7. hours to produce 0 cars.. P is the number of pears at the orchard. C is the number of boes used. a) Number of pears per bo: The direct proportion equation is P 0C. b) When C and P 0C, P 0 P 0 0 pears are paced into crates. When P 00 and P 0C, 00 0C 00 0 C 0 0 C There are 00 pears paced in crates. Number of Crates (C) 00 Number of Pears (P) Let be the percent increase. Method 00 percent percent $ $ Method Ratio of percents Ratio of handbag prices percent : 00 percent $ : $ The percent increase in the price of the handbags was %.

6 Practice.. a) Constant of proportionalit: m n 7 The equation that relates m and n is m n. b) When n and m n, m m c) When m 0 and m n, 0 n. a) Constant of proportionalit: p q 0 n n 0 The equation that relates p and q is p q. b) When p 0 and p q, 0 q q 0 q 0 c) When q 7 and p q, p 7 p 7 or. Constant of proportionalit: b a The equation is b a. When b and b a, a a a When a 9 and b a, b 9 7 a 9 b 7. Constant of proportionalit: a b The equation is a b. When b and a 0 b, a a 0 When a and a b, b b 0 b 0 b 0 b a 0 b 0 0. Let w be the weight of a person. Let a be the amount of blood in the bod. a) Constant of proportionalit: a w The constant of proportionalit is. w b) The equation is a. w c) When a and a, w w 0 w The weight of the person is 0 pounds.. a) Constant of proportionalit: H n 0 The constant of proportionalit is. b) The equation is H n. c) When n and H n, H. The height of a stac of boos is. inches. 7. a) Weight per soccer ball: oz. oz The weight per soccer ball is. ounces. b) The equation is m.n. c) When n 0 and m.n, m. 0 m. a) Cost per CD case: C n $. $ 09. The cost per CD case is $0.9. b) The equation is C 0.9n. c) When n 7 and C 0.9n, C C Let C be the cost of two dozen oranges. dollars dollars C C C C C C 9. The cost of two dozen oranges is $ Let C be the cost of renting a car for wee. 0 dollars dollars C 7 0 C C C,0 C, 0 C 0 The cost of renting a car for wee is $0. Solutions Ke Course

7 . Let n be the amount of gas he used. gallons gallons n 7 n 7 n 7 n n n. He will use. gallons of gas if he drives 7 miles.. Let be the glasses of juice needed. glasses glasses people people The caterer should have glasses of juice read.. Let be the amount of ground beef needed. 0 ounces ounces people people ounces of ground beef should be used.. Let be the amount of ta he paid. Ratio of taes Ratio of salar : 0,0 : 00, , , , , 0 He paid $,0 in taes.. Let be the amount of sales ta. Ratio of dollar amounts Ratio of percents : 0. : , 00, She must pa $. sales ta.. Let be number of cans of blue paint needed. New ratio of ellow paint to blue paint Original ratio of ellow paint to blue paint : :. He needs. cans of blue paint. 7. Let be the amount of time needed. New ratio of area to time needed Original ratio of area to time needed 7. :. : He needs hours to paint the wall.. a) Let be the number of hours needed. hours hours model boats 0 model boats It will tae her hours to paint 0 model boats. b) Let be the number of model boats. hours 0 hours model boats model boats She can paint model boats in 0 hours. Solutions Ke Course

8 9. Let be the sales for that month. Ratio of commissions Ratio of percents. :. : ,..,.,.., His sales for that month were $,. 0. a) Constant of proportionalit: The direct proportion equation is I 0. 0P. b) When P,000 and I 0. 0P, I 0. 0P 0. 0, 000. Math Journal: When I and I 0. 0P, 0.0P P 00,000,0 I 0. 0P P,0 The value of will triple as well because and are in direct proportion.. Math Journal: To find out which store has the best deal, compare the unit price. Since lb oz, Store A: Unit price $.0/lb 0. $0./oz Store B: Unit price $./ oz. $0./oz Store C: Unit price $.0/ oz 0. $0./oz Since the unit price at Store A is the lowest, Store A has the best deal. Lesson. Hands-On Activit (Recognize Inverse Proportion) Step and Step v h v h Math Journal: The value of v h gives the area of the rectangle and it is a constant. As the value of v increases, the value of h decreases. Guided Practice. For each pair of values, and : The value of increases as the value of decreases, and the product of and is a constant value. So, is inversel proportional to. The constant of proportionalit is 0.. For each pair of values, and : The value of increases as the value of decreases but the product of and is not a constant value. So, is not inversel proportional to The original equation can be rewritten as two equivalent equations in the form and. So, the equation represents an inverse proportion. The constant of proportionalit is 0.. The original equation cannot be rewritten as two equivalent equations in the form and. So, the equation does not represent an inverse proportion.. a) Answers var. Sample: Use the point (, 0) from the graph to find the constant of proportionalit: 0 0 The constant of proportionalit is 0. The inverse proportion equation is 0. b) It means that volunteers can clean the beach in 0 hours.. a) Constant of proportionalit: The constant of proportionalit is. Solutions Ke Course

9 b) Inverse proportion equation: or The inverse proportion equation is or. c) When 0 and, The value of is Let be the number of trucs. Let be the number of hours.. Constant of proportionalit: 0 Inverse proportion equation: 0 When 0 and 0, trucs are needed to paint the highwa in 0 hours. Practice.. For each pair of values, and : The value of decreases as the value of increases, and the product of and is a constant value. So, and are in inverse proportion. The constant of proportionalit is 0.. For each pair of values, and : = The value of decreases as the value of increases but the product of and is not a constant value. So, and are not in inverse proportion.. For each pair of values, and : The value of increases as the value of increases and the product of and is not a constant value. So, and are not in inverse proportion.. For each pair of values, and : The value of decreases as the value of increases, and the product of and is a constant value. So, and are in inverse proportion. The constant of proportionalit is The original equation can be rewritten as two equivalent equations in the form or. So, the equation represents an inverse proportion. The constant of proportionalit is The original equation cannot be rewritten as two equivalent equations in the form or. So, the equation does not represent an inverse proportion The original equation cannot be rewritten as two equivalent equations in the form or. So, the equation does not represent an inverse proportion The original equation can be rewritten as two equivalent equations in the form or. So, the equation represents an inverse proportion. The constant of proportionalit is 0. Solutions Ke Course

10 9. Use (, 0.) to find the constant of proportionalit: 0. The constant of proportionalit is. 0. Use (, ) to find the constant of proportionalit: 0 The constant of proportionalit is 0.. Use (0., ) to find the constant of proportionalit: 0. The constant of proportionalit is.. Use (, 0) to find the constant of proportionalit: 0 The constant of proportionalit is.. Math Journal: Two quantities are in inverse proportion when one quantit decreases and the other increases in such a wa that the product of the two quantities remains constant. So, ou can tell whether two quantities are in inverse proportion b checing whether the product of the two quantities remains constant.. a) Use the point (, ) from the graph to find the constant of proportionalit: n b The constant of proportionalit is. The inverse proportion equation is nb or b. n b) Total number of batches of bagel dough produced in one hour. c) It means that worers need to each mi batches of dough in one hour to meet the needs of customers.. a) Use the point (, ) from the graph to find the constant of proportionalit: w l The constant of proportionalit is. The inverse proportion equation is wl or l. w b) Area of a rectangle. c) It means that the rectangle with a fied area of square units has a length of units when the width is units.. a) Constant of proportionalit: 0 The constant of proportionalit is 0. b) Inverse proportion equation: 0 or 0 The inverse proportion equation is 0 or 0. c) When and 0, a) Constant of proportionalit: The constant of proportionalit is. b) Inverse proportion equation: or The inverse proportion equation is or. c) When and,. Math Journal: As is inversel proportional to, when the value of decreases, the value of increases proportionall. When the value of is halved, the value of is doubled. 9. Let n be the number of gardeners. Let t be the time in hours. Constant of proportionalit: n t Inverse proportion equation: nt When n and nt, t t It will tae gardener hours to mow 9 lawns. 0. Let s be the download speed. Let t be the time in seconds. Constant of proportionalit: s t 70,0 Inverse proportion equation: st,0 When s and st,0, t,0 Solutions Ke Course

11 t, 0 t, 0 t 0 s min It will tae minutes to download the same file.. Math Journal: Both tables show the amount paid b each person in the house per da; The products of and are the same until each house has people. Because is constant for Guest House A, the amount paid b each person in the house per da is inversel proportional to the number of people in the house. Because is not a constant for Guest House B, the amount paid b each person in the house per da is not inversel proportional to the number of people in the house.. Math Journal: The equation is in the form. So, 0 represents an inverse proportion.. As the equation is in the form m v represents a direct proportion., m v. As the equation is in the form, 00 represents an inverse proportion.. The amount of sales ta depends on the number of shirt purchased. Sales ta amount Shirt price Sales ta: The sales ta amount is directl proportional to the number of shirts purchased. Brain@Wor. Let be the cost of the boo bought in German (in Euro) plus VAT , , Let be the cost of the boo when converted to U.S. dollars Let z be the cost of the boo bought in U.S. plus ta. 0 z z.99 0 Solutions Ke Course 00z,.9 00z, z.9 z. Tom should have bought the boo in German, as it was cheaper.. Amount of gasoline he plans to use for the remaining journe 7 gal Distance left to travel mi Let be the number of gallons of gasoline he needs to travel a distance of 00 miles. 0 : 00 : , 000 0, He needs gallons to travel the remaining journe. So, Johnn is able to drive to Town Q before stopping for gasoline. Chapter Review/Test. For each pair of values, and : So, is directl proportional to.. For each pair of values, and : The value of increases as the value of decreases, and the product of and is a constant value. So, is inversel proportional to.. For each pair of values, and : 9. 7 So, is not directl proportional to. For each pair of values, and : The value of increases as the value of decreases but the product of and is not a constant value. So, and are not in inverse proportion.

12 .. 0 So, is directl proportional to. 7.. Although the graph is a straight line that does not lie along the - or -ais, it does not pass through the origin. So, it does not represent a direct proportion. Also, it is not a curve that never crosses the horizontal and vertical aes. So, it does not represent an inverse proportion.. The graph is a straight line through the origin, and does not lie along the - or -ais. So, it represents a direct proportion. 7. The graph is a curve that never crosses the horizontal and vertical aes, so it represents an inverse proportion.. The graph shows two straight lines. So, it does not represent a direct or an inverse proportion. 9. Because the original equation cannot be rewritten as an equivalent equation in 0. the form, it does not represent a direct proportion. The original equation cannot be rewritten as two equivalent equations in the form or. So, it does not represent an inverse proportion. 7 7 Because the original equation 7 can be rewritten as an equivalent equation in the form, it represents a direct proportion... Because the original equation cannot be rewritten as an equivalent equation in the form, it does not represent a direct proportion. The original equation cannot be rewritten as two equivalent equations in the form or. So, it does not represent an inverse proportion. Because the original equation can be rewritten as an equivalent equation in the form, it represents a direct proportion.. Constant of proportionalit: The constant of proportionalit is. The equation is. When and, When and,... Constant of proportionalit:. 0. The constant of proportionalit is 0.. The direct proportion equation is 0.. When and 0., 0.. When and 0., Constant of proportionalit: 0 0 The constant of proportionalit is 0. The direct proportion equation is 0. When and 0, When 0 and 0, Constant of proportionalit:. The constant of proportionalit is. The inverse proportion equation is. When. and, Solutions Ke Course 7

13 When and, Constant of proportionalit: 7 The direct proportion equation is. When and,. Constant of proportionalit: The inverse proportion equation is. When and, 9. a) Constant of proportionalit: The constant of proportionalit is and represents the unit cost per gallon of gasoline. b) The direct proportion equation is. c) When and, From the graph, he bought gallons of gasoline for $. 0. Let be the amount Jud saves. Ratio of savings Ratio of earnings :,0 : 00, , , , In one ear, she will save $970 for college.. Let be the amount of orange juice Harr needs. Ratio of original amounts of orange juice and soda water Ratio of new amounts of orange juice and soda water : :. He needs to use cups of orange juice with cups of soda water. Principal ($) P Interest Earned 7 Interest Earned ($) a) From the graph, the interest earned when the principal is $0 is $7. b) Constant of proportionalit: 0 0 The direct proportion equation is P 0I. When I and P 0I, P 0 I 70 The principal is $70 when the interest earned is $.. a) Constant of proportionalit: n t b) The inverse proportion equation is nt or t. n c) Answers var. Sample: The number of students increases as the amount of time decreases; The number of students decreases as the amount of time increases. d) It means that students tae hours to deliver 00 flers.. Let be the cost of each download. Let be the number of applications. Constant of proportionalit: The inverse proportion equation is. When.0 and, He can afford to download applications that cost onl $.0 each. Solutions Ke Course

14 Cumulative Review Chapters..9p 0.9p.p.p.p p (0.q ) 0.(0.q) (0.)() 0.q 0... ( ) 0 0. (m n) (n m) (m) (n) ()(n) ()(m) m n n m m m n n m n 7. Area of shaded region Area of trapezoid ()[ ( )] ()( ) ( ) The area of the shaded region is ( ) square meters.. Area of shaded region Area of big rectangle Area of small rectangle ( )(0) ()() 0( ) The area of the shaded region is (0 ) square meters. 9. ( 9) 0. 9 m n ( m 7n). 0 ()(z ) ()()( z ) ( p) (p q) ( z ) ( p) ( p) ( q) p p q p p q 0 p q. When, 7 7 The equations are not equivalent The equations are equivalent p p 7. p p p p p p 9 p p 7 p 7 p p 9 ( ) 9 ( ) ( ) Solutions Ke Course 9

15 . 7( ) 7 7() 7() ( ) 0.( ).().() 0.() 0.() ( r) ( r) ( 7r) () (r) () (r) () (7r) 90 Solutions Ke Course r r r 0 0r r 0 0r r 0r r 0r 0r r 0r r r r. For each pair of values, and :. 0.. So, is directl proportional to. The constant of proportionalit is.. For each pair of values, and : So, is inversel directl proportional to. The constant of proportionalit is For each pair of values, and : So, is not directl proportional to So, and are not in inverse proportion.. Because the original equation.. 7. cannot be rewritten as an equivalent equation in the form, it does not represent a direct proportion. The original equation cannot be rewritten as two equivalent equations in the form or. So, it does not represent an inverse proportion. Because the original equation can be rewritten as an equivalent equation in the form, it represents a direct proportion. The constant of proportionalit is..

16 Because the original equation can be rewritten as an equivalent equation in the form, it represents an inverse proportion. The constant of proportionalit is. 9. The graph represents a direct proportion. The constant of proportionalit is. 0. The graph represents neither.. The graph represents an inverse proportion.... The constant of proportionalit is Constant of proportionalit: 0. 0 The constant of proportionalit is 0.. The direct proportion equation is 0.. When 0 and 0., 0. 0 When and 0., Constant of proportionalit: The constant of proportionalit is 9. The direct proportion equation is 9. When and 9, 9 9 When 90 and 9, Constant of proportionalit: 0 00 The constant of proportionalit is 00. The direct proportion equation is 00. When 0 and 00, When 0 and 00, Constant of proportionalit:. 9 The constant of proportionalit is 9. The direct proportion equation is 9. When and 9, 9 9 When and 9, 9. m 9.. m(0.). m 0. m m 7. P Q m m P Q P P 0. Capacit in Cups (v cups) (0.) 9. Capacit Conversion 0 0 Capacit in Quarts ( Quarts) 9 9 a) Yes; The constant of proportionalit is. b) 0 cups of stoc are needed. c) quarts of water is equivalent to cups of water. 9. a) Time taen to print a color page.. s Total time taen. w (.w ) Solutions Ke Course 9

17 . w.() (.w) () w..w 0 (.w.) s It taes (.w.) seconds to print all the pages. b) If w 0, total time taen.(0). 0. s It taes 0. seconds to print all the pages. 0. a) Let be the number of hours Jason trains a month. 0 0 Gm B would be a better deal than Gm A after hours of training. b) For hours of training per month, Cost of Gm A: $ $() $ Cost of Gm B: $0 Because Gm B costs less, Jason should choose Gm B if he plans to train for at least hours of training per month.. a) C ms 9 m(,00) 9 m, m C S %. % b) 97 S S 00 $,00 S 00 $,00 sales is made if his commission is $97.. a) Cn b) C $. Each person will have to pa $... a) ; It represents the distance traveled b Tim. b) ; c) When Tim ccles at a speed of miles per hour, he will tae hour to ccle to his destination. 9 Solutions Ke Course. a) d) Tim taes hours to reach his destination if he travels at a speed of miles per hour. A B A ( ) A ( ) ( ) A A A A A ( )L b) ( ) 7.. a) Area of epanded rectangle r 00 r () () 00 9r r b) 9 0.9r 0 Chapter Quic Chec 9 0.9r r 09. r This is a right angle because its measure is eactl 90.. This is an acute angle because its measure is less than 90.. This is an obtuse angle because its measure is greater than 90 but less than 0.. This is a straight angle because its measure is eactl 0.