Quiz about 1st 6 Weeks 8th Math Review

Question 1

Which best decribes an irrational number?

Accepted Answer

A number that is a non-terminating, non-repeating decimal.

Answer

Any number that can be expresses as a fraction.

Answer

A positive or negative whole number.

Answer

The square root of any whole number.

Question 2

To which real number set do the following real numbers belong?

Accepted Answer

Rational Numbers

Answer

Irrational Numbers

Answer

Natural Numbers

Answer

Integers

Question 3

How do you write the standard number 0.00095 in scientific notation?

Accepted Answer

9.5 x 10^-4

Answer

9.5 x 10^-3

Answer

9.5 x 10^-5

Answer

9.5 x 10^-6

Question 4

Write the standard number 6,267,000 in scientific notation.

Accepted Answer

6.267 x 10⁶

Answer

62.67 x 10⁶

Answer

6.267 x 10⁴

Answer

6.267 x 10⁷

Question 5

How do you write 8.7 x 10^-1in standard form?

Accepted Answer

0.87

Answer

8.7

Answer

87

Answer

0.087

Question 6

Which of the following has the greatest value?

Accepted Answer

7.2 x 10⁷

Answer

3.5 x 10⁴

Answer

2.1 x 10⁶

Answer

9.9 x 10⁵

Question 7

Which statement is correct?

Accepted Answer

All integers are rational numbers.

Answer

All irrational numbers are whole numbers

Answer

A real number must be a rational number.

Answer

A repeating decimal is an irrational number.

Question 8

Solve:
7x + 19 = -2x + 55

Accepted Answer

4

Answer

14.8

Answer

8.2

Answer

-4

Question 9

Which of these shows the numbers in order from greatest to least?

Accepted Answer

0.16, 0.10, 0.07, -1.43, -2.65

Answer

-2.65, -1.43, 0.16, 0.10, 0.07

Answer

0.16, 0.10, 0.07, -2.65, -1.43

Answer

-2.65, -1.43, 0.07, 0.10, 0.16

Question 10

Write 7.8 x 10^-3in standard form.

Accepted Answer

0.0078

Answer

7,800

Answer

78

Answer

0.078

Question 11

Choose the best definition of the term INTEGERS...

Accepted Answer

Positive whole #s and their opposites and zero

Answer

Whole numbers

Answer

Negative numbers

Answer

Negative Numbers and Positive Numbers

Question 12

The correct order of number sets, from smallest to largest (not including irrational) is ________.

Accepted Answer

Natural, whole, integer, rational, real

Answer

Natural, integer, whole, rational, real

Answer

Natural, rational, whole, integer, real

Answer

Natural, whole, rational, integer, real

Question 13

x>3

Accepted Answer

x is greater than 3

Answer

x is less than 3

Answer

x is less than or equal to 3

Answer

x is greater than or equal to 3

Question 14

Question 14.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 15

6x + 4 = 2x + 24

Accepted Answer

x = 5

Answer

x = 4

Answer

x = 6

Answer

x = 7

Question 16

5 - 2x = 1 - 3x

Accepted Answer

-4

Answer

4

Answer

12

Answer

-7

Question 17

-2 + n = 3 - 4n

Accepted Answer

1

Answer

0

Answer

-1

Answer

2

Question 18

1 - 8n = 1 - 4n

Accepted Answer

0

Answer

-15

Answer

-9

Answer

12

Question 19

-3x + 7 = -2

Accepted Answer

x = 3

Answer

x = -27

Answer

x = 27

Answer

x = -3

Question 20

Question 20.

Accepted Answer

x = -12

Answer

x = - 30

Answer

x = 30

Answer

x = 12

Question 21

The product of n and 29 equals 23

Accepted Answer

29n = 23

Answer

n - 29 = 23

Answer

(n + 29) = 23

Answer

n + 29 = 23

Question 22

Dan rented a bike from Cody's Bikes. It cost $18 plus $2 per hour. If Dan paid $22, then he rented the bike for how many hours?

Choose the correct equation AND answer.

Accepted Answer

2 hours

Accepted Answer

18 + 2h = 22

Answer

22 - 18 = 2h

Answer

2h - 18 = 22

Answer

7 hours

Question 23

Kim spent $33 on a magazine and some candy bars. If the magazine cost $5 and each candy bar cost $4, then how many candy bars did she buy?

Choose the correct equation AND the correct answer.

Accepted Answer

7 candy bars

Accepted Answer

5 + 4c = 33

Answer

33 = 5c + 4c

Answer

5c + 4 = 33

Answer

3 candy bars

Question 24

Peppy Pets charges a flat fee of $15 plus $3 per hour to keep a dog during the day. Happy Hounds charges a flat fee of $21 plus $1 per hour. For how many hours is the total fee charged by the companies the same?

Accepted Answer

3 hours

Answer

2 hours

Answer

4 hours

Answer

5 hours

Question 25

A local bakery has a daily operating cost of $1800 plus a cost of $10 per cake they make. If a cake sells for $15, which equation could be used to determine the minimum number of cakes, c, they must sell each day to earn a profit?

Accepted Answer

15c > 1800 + 10c

Answer

15c < 1800 + 10c

Answer

15c = 1800 + 10c

Answer

10c < 1800 + 15c

Question 26

Sue's lunch account has $25 and she spends $2.50 every day. Troy's lunch account has $50 and she spends $3.25 every day. Write an inequality that shows when Sue's account will be more than Troy's.

Accepted Answer

25 - 2.5d > 50 - 3.25d

Answer

25 - 2.5d < 50 - 3.25d

Answer

25 + 2.5d > 50 + 3.25d

Answer

25 + 2.5d < 50 + 3.25d

Question 27

Which situation can be represented by the equation
1500 - 50x = 2000 - 100x

Accepted Answer

There are two water tanks in the city.  One tank has 1500 gallons and loses 50 gallons each hour.  The other tank has 2000 gallons and loses 100 gallons each hour.  When will the tanks have the same amount of water?

Answer

There are two water tanks in the city.  One tank has 1500 gallons and gains 50 gallons each hour.  The other tank has 2000 gallons and gains 100 gallons each hour.  When will the tanks have the same amount of water?

Answer

There are two water tanks in the city.  One tank has 1500 gallons and loses 50 gallons each hour.  The other tank has 2000 gallons and gains 100 gallons each hour.  When will the tanks have the same amount of water?

Answer

There are two water tanks in the city.  One tank has 1500 gallons and loses 50 gallons each hour.  The other tank has 2000 gallons and loses 100 gallons each hour.  When will the bigger tank have more water?

Question 28

Andrew solved the equation 3x + 5 = 4x + 2.5 and found the answer to be x = 2.5.  Amanda says that he is wrong and the answer is x = 3.5.  which statement below is true?

Accepted Answer

Andrew is correct the answer is      x = 2.5

Answer

Amanda is correct the answer is        x = 3.5

Answer

neither of the students are correct

Answer

both students are correct

Question 29

Veronica is ordering trophies for her school. Company P charges $3.50 for each trophy and a one-time engraving fee of $25. Company R charges $7.50 for each trophy and a one-time engraving fee of $17. Which inequality can be used to find x, the minimum number of trophies that can be ordered so that the total charge at company P is less than the total charge at Company R?

Accepted Answer

3.5x + 25 < 7.5x + 17

Answer

3.5 + 25x < 7.5 + 17x

Answer

3.5 + 25x > 7.5 + 17x

Answer

3.5x + 25 > 7.5x + 17

Question 30

Select the situation that could be modeled by: 120 + 25x = 45x.

Accepted Answer

George charges a flat fee of $120 to mow a lawn plus $25 an hour. Greg charges $45 a hour to mow a lawn. After how many hours do they make the same amount?

Answer

John bought a car radio for $120 and speakers for $25 each. Joe bought a radio for $45. They each paid the same. How much did they spend?

Answer

Lisa pays $120 for each purse she buys plus an additional $25 to have them personalized. Lauren pays $45 for each purse she buys. How many purses must they buy for the amount they spent to be the same?

Answer

A cell phone company charges $25 for service and $120 per gigabyte.  Another company charges $45 per gigabyte.  For how many gigabytes would the price be the same?

Question 31

Solve.
.5x - 1 = .25x + 2

Accepted Answer

x = 12

Answer

x = 3

Answer

x = -12

Answer

x = -3

Question 32

Which expression means:
15 miles less than Debbie

Accepted Answer

d - 15

Answer

d + 15

Answer

15 - d

Answer

15 + d

Question 33

Zoie completes a report by asking 70 students across campus. She found that 48% of CTMS students do not wash their hands after using the bathroom. What is the sample size?

Accepted Answer

70

Answer

48

Answer

100

Answer

CTMS students

Question 34

Manny wants to know how many students at CTMS enjoy solving math problems. What is the best sampling method?

Accepted Answer

Ask every 20th student that walks into school

Answer

ask for 20 volunteers to discuss whether they enjoy solving math problems

Answer

ask the last 20 people to arrive at CTMS

Answer

Randomly ask 2 students in the hallway

Question 35

Biased or Random?

Audi wants to find out how students get to school at Menifee Elementary so she places the names of all students into a fish bowl and pulls out 50 so she can survey them.

Accepted Answer

Random

Answer

Biased

Question 36

Biased or Random?

Jameson and Brevon want to determine the most popular Basketball player in all of Menifee County so they poll everyone at lunch.

Accepted Answer

Biased

Answer

Random

Question 37

Biased or Random?

Cassandra and Isabella want to determine the favorite subject of all students in the middle school. So they place every middle school student's name in a bucket and choose 30 to poll.

Accepted Answer

Random

Answer

Biased

Question 38

List in order from least to greatest.
5/4, 56%, 1.07, 4/5

Accepted Answer

^{56%, 4/5, 1.07, 5/4}

Answer

^{5/4, 56%, 1.07, 4/5}

Answer

^{1.07, 4/5, 5/4, 56%}

Answer

^{56%, 1.07, 4/5, 5/4}

Question 39

What is the first step when calculating the Mean Absolute Deviation?

Accepted Answer

Find the mean of the data

Answer

Find the distance each value is from the mean

Answer

Find the mean of the distances

Question 40

What is the second step when calculating the Mean Absolute Deviation?

Accepted Answer

Find the distance each value is from the mean

Answer

Find the mean of the distances

Answer

Find the mean of the data

Question 41

What is the third step when calculating the Mean Absolute Deviation?

Accepted Answer

Find the mean of the distances

Answer

Find the distance each value is from the mean

Answer

Find the mean of the data

Question 42

Find the Mean Absolute Deviation: (MAD)

10, 9, 3, 8, 10.

Accepted Answer

2

Answer

3

Answer

5

Answer

1

Question 43

Find the Mean Absolute Deviation:
5, 11, 2, 7, 16.

Accepted Answer

4.2

Answer

3.2

Answer

2.8

Answer

1.2

Question 44

Which dot plot shows more variability?

Accepted Answer

b

Answer

a

Question 45

Find the MAD:
58, 38, 54, 48, 26, 36

Accepted Answer

10

Answer

43

Answer

20

Answer

12

1st 6 Weeks 8th Math Review

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