Math 7
Homework
Chapter 1:
Review for quiz page 21 #1-11all
Answers:
1) >,
2) =,
3) -6,-4,3, abs(-4), abs(-5),
4) -10, -8, abs(-9), 12, abs(-15),
5) -11,
6) 12,
7) -6,
8) 0,
9) 1,
10) 13,
11) a. -10, -7, b. -7, c. -10
Chapter 1 Study Guide
Page 26 #9-31odd & Page 32 #9-31odd
Page 12 # 9-23odd, 24, 25, 29-39odd;
Answers:
24) The wrong sign is used. 9+(-6)=3
Page 6 #5-35odd
Chapter 2:
Page 68 #11-31odd & 32;
Answers:
32) The wrong fraction was inverted.
Page 54 #1-12all & Page 62 #3-11all;
Answers: page 54
4) 1/3,
6) -0.9,
8) 7/3,
10) -3.45,
12) 4.539
Page 62
4) -3,
6) - 20/3,
8) 1/18,
10) -1.83,
12) They did not use the LCD. Should have gotten -15/4
Page 48 #11-41odd
Chapter 3:
Page 112 #6-19all;
Answers:
6) v=-2,
8) k=3 4/5,
10) n=-1.825,
12) t=-2 1/2,
14) x=-2 3/5,
16) f=3.1,
Page 106 #7-23all;
Answers:
8) t=9,
10) k=-27,
12) t=-4,
14) b=40,
16) d=-9,
18) p=24,
20) c=-20,
22) -16 1/4
Page 100 #5-20all;
Answers:
6) z=5,
8) x=-18,
10) w=-15.4,
12) p=2/3,
14) d=-5.9,
16) x=-13.53,
18) r=-1 9/20,
20) k=-7 32/55
Page 90 #9-23odd
Page 84 #5-19odd
Chapter 4:
Page 150 #3-17odd
Page 143 #4-19all;
Answers:
4) x<1,
6) x<-3,
8) x<-2/3 the other even problems answers will be given in class because they need to be drawn.
Page 134 #4-20all;
Answers to even problems will be given in class because they need to be drawn.
Page 128 #5-25odd
Chapter 5:
Answers to review quiz Page 185:
1) 3/2; 2)15/8; 3) $0.99 per song; 4) 3.5 gallons per hour;
5) yes; 6) no; 7) yes; 8) no; 9) yes; 10) yes; 11) no;
12) 42/6=56/h; 13) g/4=6/3; 14) 1/3 MB per second;
15) a) x=32; b) z=5; c) x=7; 16) no; 17) 250 minutes
Chapter 5 Review Page 205-208
Page 202 #5-15odd and problems 18, 21
Page 196 #4-12all
Page 190 #5-29odd and problem 22 (For problems 11-21 use method 2 Property of Equality)
Page 182 #5-21odd
Page 174 #5-25odd
Page 167 #11-23odd and 30, 31
Chapter 6:
Page 256 #5-19odd, 12
Answers:
12) they did not covert 18 months to years. $45
Page 250 #4-16all, 17, 18, 19;
Answers:
4) $64,
6) $24,
8) $27.92,
10) $60,
12) $200,
14) 25%,
16) 35%,
18) $128
Page 244 #4-16all;
Answers:
4) 10m,
6) 37points,
8) increase 200%,
10) decrease 30%,
12) increase 140%,
14) increase 176.3%,
16) denominator should be 18 so get 44%
Page 236 #5-21odd
Page 230 #5-19odd
Page 224 # 5-21odd and 25-29odd
Page 218 #7-37odd
Chapter 7:
Page 303 #12-17all;
Answers:
12) 75in,
14) 3.84m,
16) 17.5mm
Page 296 #4-13all;
Answers:
4) square,
6) rhombus,
8) parallelogram,
10) 65,
12) 128
Page 286 #6-12all & Page 289 #11-15all;
Page 286 Answers:
6) right isosceles,
8) obtuse isosceles,
10) acute scalene,
12) not an acute triangle need to have all 3 angles less then 90,
Page 289 answers:
12) 60 equilateral,
14) 25 right scalene,
Page 280 #3-16all;
Answers:
4) always,
6) neither,
8) complementary,
10) supplementary,
12) complementary x=15,
14) supplementary x=31,
16) 53
Page 274 #5-13all and 21-24all;
Answers:
4) <ABE, <CBD,
6) adjacent: <SML and <LMN, <SMR and <RMQ, vertical: <NMP and <SMR, <LMN and <RMQ;
8) adjacent 55,
10) adjacent 63,
12) adjacent 15,
22) always,
24) always
Chapter 8:
Page 342 #3-10all:
Answers:
4) 33 units squared,
6) 30 units squared,
8) 24 units squared,
10) 236.625 ft squared
Page 328 #9-17odd and 12
Answers:
12) The length of the rectangle was counted twice. P=20in,
17) about 145 per feet
Page 321 #3-11odd, 15, 16 & Page 336 #3-15odd
Answers:
16) 102.8cm
Chapter 9:
Chapter 9 Review in book Page 391 #1-6, 10-17all,
Answers:
1) 158in^2,
2) 400cm^2,
3) 108m^2,
4) 16in^2,
5) 147.6m^2,
6) 241.8cm^2,
10) 96in^3,
11) 120m^3,
12) 607.5mm^3,
13) 850ft^3,
14) 2100in^3,
15) 192mm^3,
16) rectangle,
17) triangle
Extra Practice Page 394 #1-3, 6-10
Answers:
1) 62ft^2,
2) 5in^2,
3) 299.8m^2,
6) 324in^3,
7) 41.6yd^3,
8) 48m^3,
9) 13 quarts of paint,
10) a) doubling the width, b) 216in^3
Page 386 #4-12all;
Answers:
4) 1 and 1/3 ft cubed,
6) 26 and 2/3 yd cubed,
8) 7 cm cubed,
10) 112 ft cubed,
12) 576 yd cubed
Page 380 #4-13all;
Answers:
4) 729 in cubed,
6) 238 m cubed,
8)121.5 ft cubed,
10) 172.8 m cubed,
12) 3320 ft cubed
Page 366 #7-11all;
Answers:
8) 64 cm squared,
10) 322.5 in squared,
Page 359 #5-17odd
Chapter 10:
Chapter 10 Study Guide Page 455 #1-24all
Answers:
1) a. 2, b. 1 green, 1 purple,
2) a. 3, b. 3 orange, 3 blue, 3 purple,
3) a. 5, b. 1 green, 1 purple, 3 orange, 3 blue, 3 purple,
4) a. 3, b. 2 blue, 2 orange, 2 green,
5) a. 8, b. 1 green, 1 purple, 2 blue, 2 orange, 2 green, 3 orange, 3 blue, 3 purple,
6) a. 5, b. 1 green, 1 purple, 2 blue, 2 orange, 2 green,
7) 1/2 or 50%,
8) 8/35 or 22.9%,
9) 43/70 or 61.4%,
10) 57/70 or 81.4%,
11) 2/5 or 40%
12) 1/4 or 25%,
13) 3/8 or 37.5%,
14) 5/8 or 62.5%,
15) 1/8 or 12.5%,
16) 12,
17) 90,
18) 1/8 or 12.5%,
19) 2/7 or 28.6%,
20) 1/14 or 7.1%,
21) 4/21 or 19%,
22) 1/21 or 4.8%,
23) biased; the sample is not selected at random and is not representative of the population in the biology club like biology.
24) a. class A: median=88, IQR=6; class B median=91, IQR=9, in general class B has greater scores than class A. Class A has less variation than class B.
b. The difference in the medians is about 0.3 to 0.5 times the IQR.
Page 452 #3-5all;
Answers:
4) Team A: median = 3, IQR = 2, and Team B: median = 7, IRQ = 2,
The variation in the goals scored is the same, but Team B usually scores about 4 more goals per game.
Page 444 #3-11all;
Answers:
4) population: all cards in deck, Sample: 4 cards;
6) unbiased;
8) yes;
10) Sample B b/c larger;
12) 696 students;
Page 433 #3-13all;
Answers:
4) dependent;
6) 1/4;
8) 3/8;
10) 1/14;
12) 2/7;
Page 425 #7-19odd
Page 417 #6-14all;
Answers:
6) 7/50 or 14%;
7) 12/25;
8) 7/25 or 28%;
9) 21/25;
10) 17/50 or 34%;
11) 0;
12) 3/20 or 15%;
13) 45 tiles;
14) 5 cards;
Page 410 #5-15all;
Answers:
6) likely;
8) certain;
10) equally likely to happen or not happen;
12) 1/5;
14) 4/5;
16) The student found the probability if choosing a blue shirt P(not blue)= 6/10 = 3/5
Page 404 #3-17all;
Answers:
4) 4 ways, 4 ways;
6) 6,
8) 6, 7, 8, 9;
10) 1,2;
12) 2 ways, blue, blue;
14) 2 ways, purple, purple;
16) 6 ways, yellow, green, blue, blue, purple, purple
Resources
Chapter 1:
Integers: adding negative numbers
Integers: adding and subtracting negative numbers
Integers: Multiplying and dividing
Chapter 2:
Converting fractions to decimals
Adding and subtracting fractions
Chapter 3:
Solving one-step addition and subtraction
Solving one-step multiplication and Division
Solving two-step equations with fractions and decimals
Chapter 4:
Testing solutions to an inequality
Unit Rates (due all 3 practices)
Chapter 6:
Converting decimals, percent's, and fractions
Chapter 7:
Complementary, supplementary, vertical angles
Equations with variables on both sides
Chapter 8:
Finding the radius and diameter
Chapter 9:
Surface area by adding areas of the faces
Chapter 10:
Probability of compound events
Independent and dependent events
Test and Quiz Reviews:
Quiz 5.1-5.3 (Study Page 185)
Answers Page 185:
1) 3/2; 2)15/8; 3) $0.99 per song; 4) 3.5 gallons per hour;
5) yes; 6) no; 7) yes; 8) no; 9) yes; 10) yes; 11) no;
12) 42/6=56/h; 13) g/4=6/3; 14) 1/3 MB per second;
15) a) x=32; b) z=5; c) x=7; 16) no; 17) 250 minutes
Chapter 7
Study Guide page 307 #1-4, 7-10all page 310 #1-4, 9-14
Answers to page 308: 1) adjacent 21, 2) vertical 81, 3) complementary 10, supplementary 34, 7) 41 right scalene, 8) 23 isosceles obtuse, 9) 52, 10) 147
Answers to page 310: 1) Vertical 113, 2) adjacent 28, 3) supplementary 13, 4) complementary 20, 9) 28 obtuse scalene triangle, 10) 56 acute isosceles triangle,
11) 60 equilateral equiangular triangle, 12) 90, 13) 80, 14) 70
Chapter 8.1 and 8.2 cheat sheet
Chapter 8 Study guide page 345-347 #1-23all
Answers to page 345: 1) 4in, 2)30mm, 3) 50m, 4) 1.5yd, 5) 40ft, 6) 10m, 7) 2in, 8) 50mm, 9) 18.84ft, 10) 66cm, 11) 132in, 12) 24in, 13) 96ft, 14) 62cm,
15) 90.24mm, 16) 28.56in, 17) 42.84cm, 18) 50.24in^2, 19) 379.94cm^2, 20) 1386mm^2, 21) 79.25in^2, 22)29in^2, 23) 31.625ft^2
Chapter 9
Study Guide page 391 #1-6, 10-17all, and page 394 #1-3, 6-10all
Answers to page 391: 1) 158in^2, 2) 400cm^2, 3) 108m^2, 4) 16in^2, 5) 147.6m^2, 6) 241.8cm^2, 10) 96in^3, 11) 120m^3,
12) 607.5mm^3, 13) 850ft^3, 14) 2100in^3, 15) 192mm^3, 16) rectangle, 17) triangle
Answers to page 394: 1) 62ft^2, 2) 5in^2, 3) 299.8m^2, 6) 324in^3, 7) 41.6yd^3, 8) 48m^3, 9) 13 quarts of paint,
10) a) doubling the width, b) 216in^3
Chapter 10 Practice Test Answers
Chapter 10 Page 455 #1-24all, & Page 460 #1-12all
Answers to page 455: 1) a. 2, b. 1 green, 1 purple, 2) a. 3, b. 3 orange, 3 blue, 3 purple, 3) a. 5, b. 1 green, 1 purple, 3 orange, 3 blue, 3 purple,
4) a. 3, b. 2 blue, 2 orange, 2 green, 5) a. 8, b. 1 green, 1 purple, 2 blue, 2 orange, 2 green, 3 orange, 3 blue, 3 purple,
6) a. 5, b. 1 green, 1 purple, 2 blue, 2 orange, 2 green, 7) 1/2 or 50%, 8) 8/35 or 22.9%, 9) 43/70 or 61.4%, 10) 57/70 or 81.4%, 11) 2/5 or 40%
12) 1/4 or 25%, 13) 3/8 or 37.5%, 14) 5/8 or 62.5%, 15) 1/8 or 12.5%, 16) 12, 17) 90, 18) 1/8 or 12.5%, 19) 2/7 or 28.6%, 20) 1/14 or 7.1%, 21) 4/21 or 19%,
22) 1/21 or 4.8%, 23) biased; the sample is not selected at random and is not representative of the population in the biology club like biology.
24) a. class A: median=88, IQR=6; class B median=91, IQR=9, in general class B has greater scores than class A. Class A has less variation than class B.
b. The difference in the medians is about 0.3 to 0.5 times the IQR.
Answer to page 460: 1) a. 1, b. green, 2) a. 5, b. red, blue, red, green, blue, 3) 15, 4) 1/3 or 33.3%, 5) 7/15 or 46.7%, 6) 37/45 or 82.2%, 7) 4/9 or 44.4%,
8) 1/81 or 1.2%, 9) 1/120 or 0.8%, 10) 1/240 or 0.4%, 11) biased; the sample size is too small and students standing in line are more likely to say they prefer to buy their lunches at school. 12) a. Show A: median=45, IQR=10, Show B: median=35, IQR=15; Show B generally has a younger audience and more variation in ages than Show A. b. The difference in the medians is about 0.7 to 1 times the IQR.