Test 8, Unit 10

Question 1

Express algebraically. 5 more than x

Answer 1

5 + x

Question 2

Express algebraically. 8 less than n

Answer 2

n - 8

Question 3

Express algebraically. 2 more than the product of 4 times m

Answer 3

4m + 2

Question 4

Express algebraically. x squared minus y cubed

Answer 4

x(tiny)2 - y(tiny)3

Question 5

the square root of s

Answer 5

s (with a square root sign over it)

Question 6

T = 3x + 2 Find T if x = 1

Answer 6

T = 5

Question 7

T = 3x + 2 Find T if x = 1/3

Answer 7

T = 3

Question 8

T = 3x + 2 Find T if x = 4

Answer 8

T = 14

Question 9

4(3 + 6) - 9 =

Answer 9

4(9) - 9 =
36 - 9 =
27

Question 10

5 + 3 * (15 - 8) =

Answer 10

5 + 3 * 7 =
5 + 21 =
26

Question 11

(12 - 2 * 3) over 4 =

Answer 11

(12 - 6) over 4 =
6 over 4 =
3/2 or 1 1/2

Question 12

6 to the 3rd power (cubed)

Answer 12

6 x 6 x 6 =

216

Question 13

2 to the 4th power

Answer 13

2 x 2 x 2 x 2 =

16

Question 14

8 squared

Answer 14

8 x 8 =

64

Question 15

square root of 64

Answer 15

8

because 8 x 8 = 64

Question 16

square root of 100

Answer 16

10

Question 17

square root of 25

Answer 17

5

Question 18

x + 4 = 20/2

Answer 18

x + 4 - 4 = 10 - 4

x = 6

Question 19

x - 7 = 3 * 2

Answer 19

x - 7 = 6
x - 7 + 7 = 6 + 7
x = 13

Question 20

5x = 20

Answer 20

x = 20/5
x = 4

Question 21

2/3x = 8

Answer 21

3/2 * 2/3x = 8 * 3/2
x = 24/2
x = 12

Question 22

x/4 + 3 = 7

Answer 22

x/4 +3 - 3 = 7 - 3
x/4 = 4
x/4 * 4 = 4 * 4
x = 16

Question 23

3x - 6 = 12/4

Answer 23

3x - 6 + 6 = 3 + 6
3x = 9
x = 3

Question 24

19 + (-6) =

Answer 24

same as 19 - 6

13

Question 25

-5 + (-4) =

Answer 25

-9

Question 26

12 - (-9) =

Answer 26

same as 12 + 9 (2 negatives cancel making a +) | 21

Question 27

(-6) - (+8) =

Answer 27

-14

Question 28

6(-5) =

Answer 28

when multiplying 1 - & 1 + answer is - | -30

Question 29

-8(-4) =

Answer 29

when multiplying 2 - answer is + | 32

Question 30

14 - (+5) =

Answer 30

same as 14 - 5 | 9

Question 31

-36/-6

Answer 31

when dividing 2 - answer is + | 6

Question 32

-64/8

Answer 32

when dividing 1 - & 1 + answer is - | -8

Question 33

-12/-2 - (-8) =

Answer 33

6 + 8 = | 14

Question 34

8 + (-8) =

Answer 34

same as 8 - 8 | 0

Question 35

5 - 3 - 2 - 4 - 1 =

Answer 35

``` 5 - 3 - 2 - 4 - 1 = 2 - 2 - 4 - 1 = 0 - 4 - 1 = -4 - 1 = -5 ```

Question 36

square root of 576

Answer 36

24

Question 37

square root of 2,916

Answer 37

54

Question 38

T or F 5(tiny 1) = 5

Answer 38

true

Question 39

T or F 5(tiny 0) = 0

Answer 39

false

Question 40

T or F Order of operations says to simplify within parentheses first.

Answer 40

true

Question 41

T or F The division axiom states that both sides of an equation can be divided by the same number, except 0, without changing the value of the equation.

Answer 41

true

Question 42

T or F The algebraic expression xy has two terms.

Answer 42

false

Question 43

T or F A number and a variable written side by side as in 3n indicate multiplication.

Answer 43

true

Question 44

T or F Division in algebra is usually shown using the fraction bar.

Answer 44

true

Question 45

T or F The absolute value of -8 is -8.

Answer 45

false

Question 46

T or F P = 2L + 2w is an example of a formula.

Answer 46

true

Question 47

T or F -9 is greater than 0.

Answer 47

false

Question 48

T or F The sum of two negative numbers is a positive number.

Answer 48

false

Question 49

Three times a number is 33. What is the number?

Answer 49

``` 3n = 33 n = 11 ```

Question 50

Four less than twice a number is 20. What is the number?

Answer 50

2n - 4 = 20 2n = 24 n = 12