Problem Set: The Language of Algebra

Using the Language of Algebra

Use Variables and Algebraic Symbols

In the following exercises, translate from algebraic notation to words.

  1. 169169

  2. 257257
  3. 5656

  4. 3939
  5. 28÷428÷4

  6. 45÷545÷5
  7. x+8x+8

  8. x+11x+11
  9. (2)(7)(2)(7)

  10. (4)(8)(4)(8)
  11. 14<2114<21
  12. 17<3517<35
  13. 36193619

  14. 42274227
  15. 3n=243n=24

  16. 6n=366n=36
  17. y1>6y1>6

  18. y4>8y4>8
  19. 218÷6218÷6

  20. 320÷4320÷4
  21. a74a74

  22. a112a112

Identify Expressions and Equations

In the following exercises, determine if each is an expression or an equation.

  1. 96=5496=54

  2. 79=6379=63
  3. 54+354+3

  4. 63+563+5
  5. x+7x+7

  6. x+9x+9
  7. y5=25y5=25

  8. y8=32y8=32

Simplify Expressions with Exponents

In the following exercises, write in exponential form.

  1. 33333333333333

  2. 444444444444
  3. xxxxxxxxxx

  4. yyyyyyyyyyyy

Simplify Expressions with Exponents

In the following exercises, write in expanded form.

  1. 5353

  2. 8383
  3. 2828

  4. 105105

Simplify Expressions Using the Order of Operations

In the following exercises, simplify.

  1. 3+853+85

  2. (3+8)5(3+8)5

  3. 2+632+63
  4. (2+6)3(2+6)3
  5. 2312÷(95)2312÷(95)

  6. 3218÷(115)3218÷(115)
  7. 38+5238+52

  8. 47+3547+35
  9. 2+8(6+1)2+8(6+1)

  10. 4+6(3+6)4+6(3+6)
  11. 412/8412/8

  12. 236/6236/6
  13. 6+10/2+26+10/2+2

  14. 9+12/3+49+12/3+4
  15. (6+10)÷(2+2)(6+10)÷(2+2)

  16. (9+12)÷(3+4)(9+12)÷(3+4)
  17. 20÷4+6520÷4+65

  18. 33÷3+8233÷3+82
  19. 20÷(4+6)520÷(4+6)5

  20. 33÷(3+8)233÷(3+8)2
  21. 42+5242+52

  22. 32+7232+72
  23. (4+5)2(4+5)2

  24. (3+7)2(3+7)2
  25. 3(1+96)423(1+96)42

  26. 5(2+84)725(2+84)72
  27. 2[1+3(102)]2[1+3(102)]

  28. 5[2+4(32)]5[2+4(32)]

Everyday Math

Basketball

In the 2014 NBA playoffs, the San Antonio Spurs beat the Miami Heat. The table below shows the heights of the starters on each team. Use this table to fill in the appropriate symbol (=,<,>)(=,<,>).

Spurs Height Heat Height
Tim Duncan 83″ Rashard Lewis 82″
Boris Diaw 80″ LeBron James 80″
Kawhi Leonard 79″ Chris Bosh 83″
Tony Parker 74″ Dwyane Wade 76″
Danny Green 78″ Ray Allen 77″
  1. Height of Tim Duncan____Height of Rashard Lewis
  2. Height of Boris Diaw____Height of LeBron James
  3. Height of Kawhi Leonard____Height of Chris Bosh
  4. Height of Tony Parker____Height of Dwyane Wade
  5. Height of Danny Green____Height of Ray Allen

Elevation

In Colorado there are more than 5050 mountains with an elevation of over 14,000 feet.14,000 feet. The table shows the ten tallest. Use this table to fill in the appropriate inequality symbol.

Mountain Elevation
Mt. Elbert 14,433′
Mt. Massive 14,421′
Mt. Harvard 14,420′
Blanca Peak 14,345′
La Plata Peak 14,336′
Uncompahgre Peak 14,309′
Crestone Peak 14,294′
Mt. Lincoln 14,286′
Grays Peak 14,270′
Mt. Antero 14,269′

Elevation of La Plata Peak____Elevation of Mt. Antero
Elevation of Blanca Peak____Elevation of Mt. Elbert
Elevation of Gray’s Peak____Elevation of Mt. Lincoln
Elevation of Mt. Massive____Elevation of Crestone Peak
Elevation of Mt. Harvard____Elevation of Uncompahgre Peak

Writing Exercises

Explain the difference between an expression and an equation.

Why is it important to use the order of operations to simplify an expression?

Evaluating, Simplifying, and Translating Algebraic Expressions

Evaluate Algebraic Expressions

In the following exercises, evaluate the expression for the given value.

  1. 7x+8 when x=27x+8 when x=2

  2. 9x+7 when x=39x+7 when x=3
  3. 5x4 when x=65x4 when x=6

  4.  8x6 when x=78x6 when x=7
  5. x2 when x=12x2 when x=12

  6. x3 when x=5x3 when x=5
  7. x5 when x=2x5 when x=2

  8. x4 when x=3x4 when x=3
  9. 3x when x=33x when x=3

  10. 4x when x=24x when x=2
  11. x2+3x7 when x=4x2+3x7 when x=4

  12. x2+5x8 when x=6x2+5x8 when x=6
  13. 2x+4y5 when x=7,y=82x+4y5 when x=7,y=8

  14. 6x+3y9 when x=6,y=96x+3y9 when x=6,y=9
  15. (xy)2 when x=10,y=7(xy)2 when x=10,y=7

  16. (x+y)2 when x=6,y=9(x+y)2 when x=6,y=9

  17. a2+b2 when a=3,b=8a2+b2 when a=3,b=8

  18. r2s2 when r=12,s=5r2s2 when r=12,s=5
  19. 2l+2w when l=15,w=122l+2w when l=15,w=12

  20. 2l+2w when l=18,w=142l+2w when l=18,w=14

Identify Terms, Coefficients, and Like Terms

In the following exercises, list the terms in the given expression.

  1. 15x2+6x+215x2+6x+2

  2. 11x2+8x+511x2+8x+5
  3. 10y3+y+210y3+y+2

  4. 9y3+y+59y3+y+5

In the following exercises, identify the coefficient of the given term.

  1. 8a8a

  2. 13m13m
  3. 5r25r2

  4. 6x36x3

In the following exercises, identify all sets of like terms.

  1. x3,8x,14,8y,5,8x3x3,8x,14,8y,5,8x3

  2. 6z,3w2,1,6z2,4z,w26z,3w2,1,6z2,4z,w2
  3. 9a,a2,16ab,16b2,4ab,9b29a,a2,16ab,16b2,4ab,9b2

  4. 3,25r2,10s,10r,4r2,3s3,25r2,10s,10r,4r2,3s

Simplify Expressions by Combining Like Terms

In the following exercises, simplify the given expression by combining like terms.

  1. 10x+3x10x+3x

  2. 15x+4x15x+4x
  3. 17a+9a17a+9a

  4. 18z+9z18z+9z
  5. 4c+2c+c4c+2c+c

  6. 6y+4y+y6y+4y+y
  7. 9x+3x+89x+3x+8

  8. 8a+5a+98a+5a+9
  9. 7u+2+3u+17u+2+3u+1

  10. 8d+6+2d+58d+6+2d+5
  11. 7p+6+5p+47p+6+5p+4

  12. 8x+7+4x58x+7+4x5
  13. 10a+7+5a2+7a410a+7+5a2+7a4

  14. 7c+4+6c3+9c17c+4+6c3+9c1
  15. 3x2+12x+11+14x2+8x+53x2+12x+11+14x2+8x+5

  16. 5b2+9b+10+2b2+3b45b2+9b+10+2b2+3b4

Translate English Phrases into Algebraic Expressions

In the following exercises, translate the given word phrase into an algebraic expression.

  1. The sum of 8 and 12

  2. The sum of 9 and 1
  3. The difference of 14 and 9

  4. 8 less than 19
  5. The product of 9 and 7

  6. The product of 8 and 7
  7. The quotient of 36 and 9

  8. The quotient of 42 and 7
  9. The difference of xx and 44

  10. 33 less than xx
  11. The product of 66 and yy

  12. The product of 99 and yy
  13. The sum of 8x8x and 3x3x

  14. The sum of 13x13x and 3x3x
  15. The quotient of yy and 33

  16. The quotient of yy and 88
  17. Eight times the difference of yy and nine

  18. Seven times the difference of yy and one
  19. Five times the sum of xx and yy

  20. Nine times five less than twice xx

Translate English Phrases into Algebraic Expressions

In the following exercises, write an algebraic expression.

  1. Adele bought a skirt and a blouse. The skirt cost $15$15 more than the blouse. Let bb represent the cost of the blouse. Write an expression for the cost of the skirt.

  2. Eric has rock and classical CDs in his car. The number of rock CDs is 33 more than the number of classical CDs. Let cc represent the number of classical CDs. Write an expression for the number of rock CDs.
  3. The number of girls in a second-grade class is 44 less than the number of boys. Let bb represent the number of boys. Write an expression for the number of girls.

  4. Marcella has 66 fewer male cousins than female cousins. Let ff represent the number of female cousins. Write an expression for the number of boy cousins.
  5. Greg has nickels and pennies in his pocket. The number of pennies is seven less than twice the number of nickels. Let nn represent the number of nickels. Write an expression for the number of pennies.

  6. Jeannette has $5$5 and $10$10 bills in her wallet. The number of fives is three more than six times the number of tens. Let tt represent the number of tens. Write an expression for the number of fives.

Everyday Math

In the following exercises, use algebraic expressions to solve the problem.

Car insurance

Justin’s car insurance has a $750$750 deductible per incident. This means that he pays $750$750 and his insurance company will pay all costs beyond $750$750. If Justin files a claim for $2,100$2,100, how much will he pay, and how much will his insurance company pay?

Home insurance

Pam and Armando’s home insurance has a $2,500$2,500 deductible per incident. This means that they pay $2,500$2,500 and their insurance company will pay all costs beyond $2,500$2,500. If Pam and Armando file a claim for $19,400$19,400, how much will they pay, and how much will their insurance company pay?

Writing Exercises

Explain why “the sum of x and y” is the same as “the sum of y and x,” but “the difference of x and y” is not the same as “the difference of y and x.” Try substituting two random numbers for xx and yy to help you explain.

Explain the difference between “44 times the sum of xx and yy” and “the sum of 44 times xx and yy.”

Subtraction Property of Equality

Determine Whether a Number is a Solution of an Equation

In the following exercises, determine whether each given value is a solution to the equation.

Exercise 1

x+13=21x+13=21

  1. x=8x=8

  2. x=34x=34

Exercise 2

y+18=25y+18=25

  1. y=7y=7
  2. y=43y=43

Exercise 3

m4=13m4=13

  1. m=9m=9

  2. m=17m=17

Exercise 4

n9=6n9=6

  1. n=3n=3
  2. n=15n=15

Exercise 5

3p+6=153p+6=15

  1. p=3p=3

  2. p=7p=7

Exercise 6

8q+4=208q+4=20

  1. q=2q=2
  2. q=3q=3

Exercise 7

18d9=2718d9=27

  1. d=1d=1

  2. d=2d=2

Exercise 8

24f12=6024f12=60

  1. f=2f=2
  2. f=3f=3

Exercise 9

8u4=4u+408u4=4u+40

  1. u=3u=3

  2. u=11u=11

Exercise 10

7v3=4v+367v3=4v+36

  1. v=3v=3
  2. v=11v=11

Exercise 11

20h5=15h+3520h5=15h+35

  1. h=6h=6

  2. h=8h=8

Exercise 12

18k3=12k+3318k3=12k+33

  1. k=1k=1
  2. k=6k=6

Model the Subtraction Property of Equality

In the following exercises, write the equation modeled by the envelopes and counters and then solve using the subtraction property of equality.

Exercise 1

The image is divided in half vertically. On the left side is an envelope with 2 counters below it. On the right side is 5 counters.

Exercise 2

The image is divided in half vertically. On the left side is an envelope with 4 counters below it. On the right side is 7 counters.

Exercise 3

The image is divided in half vertically. On the left side is an envelope with three counters below it. On the right side is 6 counters.

Exercise 4

The image is divided in half vertically. On the left side is an envelope with 5 counters below it. On the right side is 9 counters.

Solve Equations using the Subtraction Property of Equality

In the following exercises, solve each equation using the subtraction property of equality.

  1. a+2=18a+2=18

  2. b+5=13b+5=13
  3. p+18=23p+18=23

  4. q+14=31q+14=31
  5. r+76=100r+76=100

  6. s+62=95s+62=95
  7. 16=x+916=x+9

  8. 17=y+617=y+6
  9. 93=p+2493=p+24

  10. 116=q+79116=q+79
  11. 465=d+398465=d+398

  12. 932=c+641932=c+641

Solve Equations using the Addition Property of Equality

In the following exercises, solve each equation using the addition property of equality.

  1. y3=19y3=19

  2. x4=12x4=12
  3. u6=24u6=24

  4. v7=35v7=35
  5. f55=123f55=123

  6. g39=117g39=117
  7. 19=n1319=n13

  8. 18=m1518=m15
  9. 10=p3810=p38

  10. 18=q7218=q72
  11. 268=y199268=y199

  12. 204=z149204=z149

Translate Word Phrase to Algebraic Equations

In the following exercises, translate the given sentence into an algebraic equation.

  1. The sum of 88 and 99 is equal to 1717.

  2. The sum of 77 and 99 is equal to 1616.
  3. The difference of 2323 and 1919 is equal to 44.

  4. The difference of 2929 and 1212 is equal to 1717.
  5. The product of 33 and 99 is equal to 2727.

  6. The product of 66 and 88 is equal to 4848.
  7. The quotient of 5454 and 66 is equal to 99.

  8. The quotient of 4242 and 77 is equal to 66.
  9. Twice the difference of nn and 1010 gives 5252.

  10. Twice the difference of mm and 1414 gives 6464.
  11. The sum of three times yy and 1010 is 100100.

  12. The sum of eight times xx and 44 is 6868.

Translate to an Equation and Solve

In the following exercises, translate the given sentence into an algebraic equation and then solve it.

  1. Five more than pp is equal to 2121.

  2. Nine more than qq is equal to 4040.
  3. The sum of rr and 1818 is 7373.

  4. The sum of ss and 1313 is 6868.
  5. The difference of dd and 3030 is equal to 5252.

  6. The difference of cc and 2525 is equal to 7575.
  7. 1212 less than uu is 8989.

  8. 1919 less than ww is 5656.
  9. 325325 less than cc gives 799799.

  10. 299299 less than dd gives 850.

Everyday Math

Insurance

Vince’s car insurance has a $500 deductible. Find the amount the insurance company will pay, p, for an $1800 claim by solving the equation 500+p=1800.

Insurance

Marta’s homeowner’s insurance policy has a $750 deductible. The insurance company paid $5800 to repair damages caused by a storm. Find the total cost of the storm damage, d, by solving the equation d750=5800.

Sale purchase

Arthur bought a suit that was on sale for $120 off. He paid $340 for the suit. Find the original price, p, of the suit by solving the equation p120=340.

Sale purchase

Rita bought a sofa that was on sale for $1299. She paid a total of $1409, including sales tax. Find the amount of the sales tax, t, by solving the equation 1299+t=1409.

Writing Exercises

Is x=1 a solution to the equation 8x2=166x? How do you know?

Write the equation y5=21 in words. Then make up a word problem for this equation.

Finding Multiples and Factors

Identify Multiples of Numbers

In the following exercises, list all the multiples less than 50 for the given number.

  1. 2

  2. 3
  3. 4

  4. 5
  5. 6

  6. 7
  7. 8

  8. 9
  9. 10

  10. 12

Use Common Divisibility Tests

In the following exercises, use the divisibility tests to determine whether each number is divisible by 2,3,4,5,6,and10.

  1. 84

  2. 96
  3. 75

  4. 78
  5. 168

  6. 264
  7. 900

  8. 800
  9. 896

  10. 942
  11. 375

  12. 750
  13. 350

  14. 550
  15. 1430

  16. 1080
  17. 22,335

  18. 39,075

Find All the Factors of a Number

In the following exercises, find all the factors of the given number.

  1. 36

  2. 42
  3. 60

  4. 48
  5. 144

  6. 200
  7. 588

  8. 576

Identify Prime and Composite Numbers

In the following exercises, determine if the given number is prime or composite.

  1. 43

  2. 67
  3. 39

  4. 53
  5. 71

  6. 119
  7. 481

  8. 221
  9. 209

  10. 359
  11. 667

  12. 1771

Everyday Math

Banking

Frank’s grandmother gave him $100 at his high school graduation. Instead of spending it, Frank opened a bank account. Every week, he added $15 to the account. The table shows how much money Frank had put in the account by the end of each week. Complete the table by filling in the blanks.

Weeks after graduation Total number of dollars Frank put in the account Simplified Total
0 100 100
1 100+15 115
2 100+152 130
3 100+153
4 100+15[]
5 100+[]
6
20
x

Banking

In March, Gina opened a Christmas club savings account at her bank. She deposited $75 to open the account. Every week, she added $20 to the account. The table shows how much money Gina had put in the account by the end of each week. Complete the table by filling in the blanks.

Weeks after opening the account Total number of dollars Gina put in the account Simplified Total
0 75 75
1 75+20 95
2 75+202 115
3 75+203
4 75+20[]
5 75+[]
6
20
x

Writing Exercises

If a number is divisible by 2 and by 3, why is it also divisible by 6?

What is the difference between prime numbers and composite numbers?

Prime Factorization and the Least Common Multiple

Find the Prime Factorization of a Composite Number

In the following exercises, find the prime factorization of each number using the factor tree method.

  1. 86

  2. 78
  3. 132

  4. 455
  5. 693

  6. 420
  7. 115

  8. 225
  9. 2475

  10. 1560

Find the Prime Factorization of a Composite Number

In the following exercises, find the prime factorization of each number using the ladder method.

  1. 56

  2. 72
  3. 168

  4. 252
  5. 391

  6. 400
  7. 432

  8. 627
  9. 2160

  10. 2520

Find the Prime Factorization of a Composite Number

In the following exercises, find the prime factorization of each number using any method.

  1. 150

  2. 180
  3. 525

  4. 444
  5. 36

  6. 50
  7. 350

  8. 144

Find the Least Common Multiple (LCM) of Two Numbers

In the following exercises, find the least common multiple (LCM) by listing multiples.

  1. 8,12

  2. 4,3
  3. 6,15

  4. 12,16
  5. 30,40

  6. 20,30
  7. 60,75

  8. 44,55

Find the Least Common Multiple (LCM) of Two Numbers

In the following exercises, find the least common multiple (LCM) by using the prime factors method.

  1. 8,12

  2. 12,16
  3. 24,30

  4. 28,40
  5. 70,84

  6. 84,90

Find the Least Common Multiple (LCM) of Two Numbers

In the following exercises, find the least common multiple (LCM) using any method.

  1. 6,21

  2. 9,15
  3. 24,30

  4. 32,40

Everyday Math

Grocery shopping

Hot dogs are sold in packages of ten, but hot dog buns come in packs of eight. What is the smallest number of hot dogs and buns that can be purchased if you want to have the same number of hot dogs and buns? (Hint: it is the LCM!)

Grocery shopping

Paper plates are sold in packages of 12 and party cups come in packs of 8. What is the smallest number of plates and cups you can purchase if you want to have the same number of each? (Hint: it is the LCM!)

Writing Exercises

Do you prefer to find the prime factorization of a composite number by using the factor tree method or the ladder method? Why?

Do you prefer to find the LCM by listing multiples or by using the prime factors method? Why?

Chapter Review Exercises

Use the Language of Algebra

Use Variables and Algebraic Symbols

In the following exercises, translate from algebra to English.

  1. 38

  2. 12x
  3. 24÷6

  4. 9+2a
  5. 5047

  6. 3y<15
  7. n+4=13

  8. 32k=7

Identify Expressions and Equations

In the following exercises, determine if each is an expression or equation.

  1. 5+u=84

  2. 366s
  3. 4y11

  4. 10x=120

Simplify Expressions with Exponents

In the following exercises, write in exponential form.

  1. 222

  2. aaaaa
  3. xxxxxx

  4. 101010

Simplify Expressions with Exponents

In the following exercises, write in expanded form.

  1. 84

  2. 36
  3. y5

  4. n4

Simplify Expressions with Exponents

In the following exercises, simplify each expression.

  1. 34

  2. 106
  3. 27

  4. 43

Simplify Expressions Using the Order of Operations

In the following exercises, simplify.

  1. 10+25

  2. (10+2)5
  3. (30+6)÷2

  4. 30+6÷2
  5. 72+52

  6. (7+5)2
  7. 4+3(101)

  8. (4+3)(101)

Evaluate, Simplify, and Translate Expressions

Evaluate an Expression

In the following exercises, evaluate the following expressions.

  1. 9x5 when x=7

  2. y3 when y=5
  3. 3a4b when a=10,b=1

  4. bh when b=7,h=8

Identify Terms, Coefficients and Like Terms

In the following exercises, identify the terms in each expression.

  1. 12n2+3n+1

  2. 4x3+11x+3

Identify Terms, Coefficients and Like Terms

In the following exercises, identify the coefficient of each term.

  1. 6y

  2. 13x2

In the following exercises, identify the like terms.

  1. 5x2,3,5y2,3x,x,4

  2. 8,8r2,8r,3r,r2,3s

Simplify Expressions by Combining Like Terms

In the following exercises, simplify the following expressions by combining like terms.

  1. 15a+9a

  2. 12y+3y+y
  3. 4x+7x+3x

  4. 6+5c+3
  5. 8n+2+4n+9

  6. 19p+5+4p1+3p
  7. 7y2+2y+11+3y28

  8. 13x2x+6+5x2+9x

Translate English Phrases to Algebraic Expressions

In the following exercises, translate the following phrases into algebraic expressions.

  1. the difference of x and 6

  2. the sum of 10 and twice a
  3. the product of 3n and 9

  4. the quotient of s and 4
  5. 5 times the sum of y and 1

  6. 10 less than the product of 5 and z

Translate English Phrases to Algebraic Expressions

In the following exercises, write the algebraic expressions that can be found in each sentence.

  1. Jack bought a sandwich and a coffee. The cost of the sandwich was $3 more than the cost of the coffee. Call the cost of the coffee c. Write an expression for the cost of the sandwich.

  2. The number of poetry books on Brianna’s bookshelf is 5 less than twice the number of novels. Call the number of novels n. Write an expression for the number of poetry books.

Subtraction Property of Equality

Determine Whether a Number is a Solution of an Equation

In the following exercises, determine whether each number is a solution to the equation.

Exercise 1

y+16=40

  1. 24

  2. 56

Exercise 2

d6=21

  1.  15
  2. 27
Exercise 3

4n+12=36

  1. 6

  2. 12

Exercise 4

20q10=70

  1. 3
  2. 4
Exercise 5

15x5=10x+45

  1.  2

  2. 10

Exercise 6

22p6=18p+86

  1. 4
  2. 23

Model the Subtraction Property of Equality

In the following exercises, write the equation modeled by the envelopes and counters and then solve the equation using the subtraction property of equality.

This image is divided into two parts: the first part shows an envelope and 3 blue counters and the next to it, the second part shows five counters.

This image is divided into two parts: the first part shows an envelope and 4 blue counters and next to it, the second part shows 9 counters.

Solve Equations using the Subtraction Property of Equality

In the following exercises, solve each equation using the subtraction property of equality.

  1. c+8=14

  2. v+8=150
  3. 23=x+12

  4. 376=n+265

Solve Equations using the Addition Property of Equality

In the following exercises, solve each equation using the addition property of equality.

  1. y7=16

  2. k42=113
  3. 19=p15

  4. 501=u399

Translate English Sentences to Algebraic Equations

In the following exercises, translate each English sentence into an algebraic equation.

  1. The sum of 7 and 33 is equal to 40.

  2. The difference of 15 and 3 is equal to 12.
  3. The product of 4 and 8 is equal to 32.

  4. The quotient of 63 and 9 is equal to 7.
  5. Twice the difference of n and 3 gives 76.

  6. The sum of five times y and 4 is 89.

Translate to an Equation and Solve

In the following exercises, translate each English sentence into an algebraic equation and then solve it.

  1. Eight more than x is equal to 35.

  2. 21 less than a is 11.
  3. The difference of q and 18 is 57.

  4. The sum of m and 125 is 240.

Mixed Practice

In the following exercises, solve each equation.

  1. h15=27

  2. k11=34
  3. z+52=85

  4. x+93=114
  5. 27=q+19

  6. 38=p+19
  7. 31=v25

  8. 38=u16

Finding Multiples and Factors

Identify Multiples of Numbers

In the following exercises, list all the multiples less than 50 for each of the following.

  1. 3

  2. 2
  3. 8

  4. 10

Use Common Divisibility Tests

In the following exercises, using the divisibility tests, determine whether each number is divisible by 2, by 3, by 5, by 6, and by 10.

  1. 96

  2. 250
  3. 420

  4. 625

Find All the Factors of a Number

In the following exercises, find all the factors of each number.

  1. 30

  2. 70
  3. 180

  4. 378

Identify Prime and Composite Numbers

In the following exercises, identify each number as prime or composite.

  1. 19

  2. 51
  3. 121

  4. 219

Prime Factorization and the Least Common Multiple

Find the Prime Factorization of a Composite Number

In the following exercises, find the prime factorization of each number.

  1. 84

  2. 165
  3. 350

  4. 572

Find the Least Common Multiple of Two Numbers

In the following exercises, find the least common multiple of each pair of numbers.

  1. 9,15

  2. 12,20
  3. 25,35

  4. 18,40

Everyday Math

Describe how you have used two topics from The Language of Algebra chapter in your life outside of your math class during the past month.

Chapter Practice Test

In the following exercises, translate from an algebraic equation to English phrases.

  1. 64
  2. 15x

In the following exercises, identify each as an expression or equation.

  1. 58+10
  2. x+6=9

  3. 311=33
  4. Write nnnnnn in exponential form.

  5. Write 35 in expanded form and then simplify.

In the following exercises, simplify, using the order of operations.

  1. 4+35
  2. (8+1)4

  3. 1+6(31)
  4. (8+4)÷3+1

  5. (1+4)2
  6. 5[2+7(98)]

In the following exercises, evaluate each expression.

  1. 8x3 when x=4
  2. y3 when y=5

  3. 6a2b when a=5,b=7
  4. hw when h=12,w=3

Simplify by combining like terms.

  1.  6x+8x
  2. 9m+10+m+3

In the following exercises, translate each phrase into an algebraic expression.

  1. 5 more than x

  2. the quotient of 12 and y
  3. three times the difference of a and b

  4. Caroline has 3 fewer earrings on her left ear than on her right ear. Call the number of earrings on her right ear, r. Write an expression for the number of earrings on her left ear.

In the following exercises, solve each equation.

  1. n6=25

  2. x+58=71

In the following exercises, translate each English sentence into an algebraic equation and then solve it.

  1. 15 less than y is 32.

  2. the sum of a and 129 is 164.
  3. List all the multiples of 4, that are less than 50.

  4. Find all the factors of 90.
  5. Find the prime factorization of 1080.

  6. Find the LCM (Least Common Multiple) of 24 and 40.