Test 5, Unit 4 (4.16 - 4.33)

Question 1

-6

+(-9)

Answer 1

-15

Question 2

+5

x(-4)

Answer 2

-20

Question 3

+36 divided by +12

Answer 3

3

Question 4

• 11
• (-18)

Answer 4

7

Question 5

-9

x(-8)

Answer 5

72

Question 6

45 divided by -5

Answer 6

-9

Question 7

15

-(+7)

Answer 7

8

Question 8

31

+(-8)

Answer 8

23

Question 9

(12x³)(3xy²)

Answer 9

36x⁴y²

Question 10

(40m³n) divided by (5m)

Answer 10

8m²n

Question 11

square root of 100

Answer 11

10

Question 12

3³

Answer 12

27

Question 13

2⁵

Answer 13

32

Question 14

negative square root of 49

Answer 14

-7

Question 15

_+_square root of 64

Answer 15

_+_8

Question 16

25²

Answer 16

625

Question 17

square root of 81

Answer 17

9

Question 18

square root of 1,225

Answer 18

96

Question 19

4x + 6 = 34

Answer 19

4x + 6 - 6 = 34 - 6

4x/4 = 28/4

x = 7

Question 20

x/4 = 8 * 3

Answer 20

x/4 = 24

4 * x/4 = 24 * 4

x = 96

Question 21

2x² + 3x²

Answer 21

5x²

Question 22

3y³ + 2x²y + 4x²y + 5y³

Answer 22

8y³ + 6x²y

Question 23

4a²b - 2ab + 4ab - ab - 3a²b

Answer 23

4a²b - 3a²b + 4ab - 2ab - ab

1a²b + 1ab

write this as:

a²b + ab

Question 24

m³ + m² + 2m² - m³

Answer 24

3m²

Question 25

x² + 2x² - 12 - 15

Answer 25

3x² - 27

Question 26

x = 8 + 5

Answer 26

x = 13

Question 27

3x = 15

Answer 27

3x/3 = 15/3 x = 5

Question 28

x/5 = 12

Answer 28

5 \* x/5 = 12 \* 5 x = 60

Question 29

4x - 6 = 2x + 10

Answer 29

4x - 2x - 6 = 2x - 2x + 10 2x - 6 + 6 = 10 + 6 2x = 16 x = 8

Question 30

.3x = 18

Answer 30

.3x \* 10 = 18 \* 10 3x = 180 3x/3 = 180/3 x = 60

Question 31

The principle square root of 144 is -12

Answer 31

F

Question 32

A negative number plus a negative number is a positive number

Answer 32

F

Question 33

The cube root of 8 is 2

Answer 33

T

Question 34

The algebraic expression 3x² - 6 can be read as six less than three times x squared

Answer 34

T

Question 35

In /25 (the square root of 25) , the 25 is called an index

Answer 35

F

Question 36

The square root of 17 is an irrational number

Answer 36

T

Question 37

Only whole numbers are rational numbers

Answer 37

F

Question 38

x⁵ means x + x + x + x + x

Answer 38

F

Question 39

The number -13 is greater than -15

Answer 39

T

Question 40

The absolute value of -8 is 8

Answer 40

T

Question 41

multiply 6x by 3x³y

Answer 41

18x⁴y

Question 42

find the positive square root of 196

Answer 42

14

Question 43

divide -18 by 3

Answer 43

-6

Question 44

write the absolute value of -9

Answer 44

9

Question 45

divide y⁵ by y⁷

Answer 45

1 over y²

Question 46

write the number of terms in 6x²y + 2xy + 8

Answer 46

3

Question 47

Add +5 and -5

Answer 47

0

Question 48

Evaluate 4x³ + 6xy if x is 2 and y is -4

Answer 48

4(2³) + 6(2)(-4) = 4 (8) + 12(-4) = 32 + (-48) = -16

Question 49

Evaluate 3abc if a = 6, b = -4, c = 0

Answer 49

3(6)(-4)(0) = 0

Question 50

Evaluate x² - y² if x = -4 and y = .5

Answer 50

(-4)² - (.5)² = 16 - .25 = 15.75

Question 51

A certain number plus 8 equals 24. What is the number?

Answer 51

x + 8 = 24 x + 8 - 8 = 24 - 8 x = 16

Question 52

Mary and Marsha have a combined age of 36. Marsha is twice as old as Mary. How old is Mary?

Answer 52

x + 2x = 36 3x = 36 3x/3 = 36/3 x = 12

Question 53

Separate the number 53 into three parts so that the second number is 3 less than the first number and the third number is twice the first number. Give the value of the second number.

Answer 53

x + x - 3 + 2x = 53 4x - 3 = 53 4x - 3 + 3 = 53 + 3 4x = 56 4x/4 = 56/4 x = 14 The second number is 3 less than the first number, so the first number is 14, the second is 11. 14 - 3 = 11

Question 54

Three times a certain number is 21. What is the number?

Answer 54

3x = 21 3x/3 = 21/3 x = 7

Question 55

Elaine is 7 years older than Jane. Their combined age is 23. How old is Elaine?

Answer 55

x + x + 7 = 23 2x + 7 = 23 2x + 7 - 7 = 23 - 7 2x = 16 2x/2 = 16/2 x = 8 x + 7 = 15, Elaine is 15.

Question 56

complete the table and graph for the formula Y = 2x x 0 1 2 3 4 5 6 7 8 9 Y

Answer 56

Y = 2x, so multiply each number in the x line by 2 to get the Y line. x 0 1 2 3 4 5 6 7 8 9 Y 0 2 4 6 8 10 12 14 16 18