Question

help!

Answer 1

Andrew is showing his work in simplifying (−5.7 + 2.2) − 1.1.

Step 1: (2.2 − 5.7) − 1.1
Step 2: 2.2 − (5.7 + 1.1)
Step 3: 2.2 − (6.8)
Step 4: −4.6

Which statement is true?

In step 1, Andrew used the commutative property.
In step 2, Andrew used the distributive property.
In step 3, Andrew used the associative property.
In step 4, Andrew's answer is incorrect.
@Vocaloid

Answer 2

well, he switched the 2.2 and the -5.7, do you know what property that is?

Answer 3

commutative?

Answer 4

yup!

Answer 5

so A is the answer?

Answer 6

@Vocaloid

Answer 7

yes

Answer 8

two hints:

1. subtract the two numbers
2. distance must be positive

that should be enough to find the answer

Answer 9

C?

Answer 10

subtract...

Answer 11

A?

Answer 12

@Vocaloid

Answer 13

yup, much better

Answer 14

)Which statement best explains the value of 12 − (−4)?

The additive inverse of −4 is −4, so 12 − (−4) = 16.
The additive inverse of −4 is −4, so 12 − (−4) = 8.
The additive inverse of −4 is +4, so 12 − (−4) = 8.
The additive inverse of −4 is +4, so 12 − (−4) = 16.

Answer 15

well, when we take the additive inverse, we switch the sign

so -4 becomes +4 and 12 -(-4) becomes 12 + 4

Answer 16

d?

Answer 17

yes

Answer 18

@Vocaloid

Answer 19

just multiply -3/16 times 4

Answer 20

-0.75

Answer 21

as a fraction, please...

Answer 22

oh okay sorry

Answer 23

-3 /4

Answer 24

yes, that's your answer

Answer 25

Where is the answer to the expression 5 − 9 located on a horizontal number line?

9 units to the left of 5
9 units to the right of 5
4 units to the right of 5
4 units to the left of 5

Answer 26

@Vocaloid

Answer 27

-4

Answer 28

actually, let's think of it another way

5-9 means start at 5 and go left 9

Answer 29

so A?

Answer 30

@Vocaloid

Answer 31

@Vocaloid

Answer 32

right

Answer 33

The total charge on 4 particles is −36 units. All the particles have the same charge.

What is the charge on each particle?

−9 units
−8 units
8 units
9 units

Answer 34

divide: total charge/number of particles

Answer 35

-9? @Vocaloid

Answer 36

yes

Answer 37

well, -6-(-4) = ?

Answer 38

-2 @Vocaloid

Answer 39

right, now take a look at your answer choices and see which one matches -2

Answer 40

b?

Answer 41

right

Answer 42

Why is 1 + (−5) equal to −4?

Because it is 5 units to the right of 1 on a horizontal number line
Because it is 5 units to the left of 0 on a horizontal number line
Because it is 5 units to the right of 0 on a horizontal number line
Because it is 5 units to the left of 1 on a horizontal number line

Answer 43

@Vocaloid

Answer 44

@Vocaloid

Answer 45

@Vocaloid

Answer 46

@Vocaloid

Answer 47

1 + (-5) means start at 1 and go left 5

Answer 48

d? @Vocaloid

Answer 49

right

Answer 50

Which fraction is equivalent to negative 7 over 8?

8 over negative 7
7 over negative 8
negative 7 over negative 8
7 over 8

Answer 51

hint: move the negative sign to the denominator

Answer 52

b?

Answer 53

@Vocaloid

Answer 54

right

Answer 55

@Vocaloid

Answer 56

alright, we start with 35, and take away the price of the book and magazine

using additive inverses, our equation should look like:

35 + (-price of book) + (-price of magazine)

Answer 57

i got 23 @Vocaloid

Answer 58

now look at the answer choices and see which one matches...

Answer 59

c? @Vocaloid

Answer 60

yes

Answer 61

@Vocaloid

Answer 62

well, all you need to do is divide the two fractions

(-6/3) divided by (2)/(-9) = ?

Answer 63

@Vocaloid

Answer 64

look at the answer choices first

now, our answer will be (total miles) divided by (distance per day)

which answer choices matches that description?

Answer 65

b

Answer 66

yes

Answer 67

Ryan has a shelf that is 64 over 3 inches wide. How many magazines can Ryan arrange on the shelf if each magazine is 4 over 3 inches thick?

28, because the number of magazines is 64 over 3 ÷ 4 over 3
27, because the number of magazines is 64 over 3 • 4 over 3
16, because the number of magazines is 64 over 3 ÷ 4 over 3
43, because the number of magazines is 64 over 3 ⋅ 4 over 3

Answer 68

@Vocaloid

Answer 69

hint: number of magazines = (width of shelf)/(thickness of magazine)

Answer 70

A? @Vocaloid

Answer 71

check your math again

Answer 72

D

Answer 73

(64/3) divided by (4/3) = ?

Answer 74

plug each of them on a calculator and pick the two that don't repeat

Answer 75

what do you mean.. can you give me an example please?
@Vocaloid

Answer 76

start with the first number... 7/4
type 7/4 into a calculator and see if the decimal stops or repeats

Answer 77

Abel opened a bank account. He deposited $63.50 into his account every month for 20 months. He used $40.50 every month to pay for comic books. After 20 months, he used 1 over 2 of the total money left in his account to go to a comic book convention. What is the total amount of money Abel spent to go to the convention?

$230.00
$248.00
$460.00
$920.00
@Vocaloid

Answer 78

ok... he saves 63.50 and spends 40.50 per month, so how much money does he have left every month?

Answer 79

what is the equation for me to solve @Vocaloid

Answer 80

I want you to think hard about this one...

he saves $63.50 and spends $40.50... how much money does he have left?

Answer 81

ok i got c @Vocaloid

Answer 82

nope, not quite...

he has 460 in his account and he spends half on the convention, so how much does he spend on the convention?

Answer 83

b? @Vocaloid

Answer 84

check again... what is half of 460?

Answer 85

A?

Answer 86

right

Answer 87

Michelle earned $150 during the summer for babysitting. She bought 2 packs of Blu-ray disks worth $65 each using her babysitting money. How much money was left after she bought the Blu-ray disks?

$20
$85
$215
$280