Question

help please!

Answer 1

@Vocaloid

Answer 2

Look at the following numbers:

−2, −1, 0, 2

Which pair of numbers has a sum of 0?

−1, 2
−2, 0
−2, 2
−1, 0

Answer 3

Which of the following describes a situation in which the total distance a soccer player travels is zero meters from his starting point?

The player runs 9 meters forward, and then runs 0 meters in the opposite direction.
The player runs 5 meters forward, and then runs 6 meters in the opposite direction.
The player runs 10 meters forward, and then runs 10 meters in the opposite direction.
The player runs 6 meters forward, and then runs 5 meters in the opposite direction.

Answer 4

@Vocaloid

Answer 5

well, look at each of your answer choices...

−1, 2
−2, 0
−2, 2
−1, 0

which answer choice adds up to 0?

Answer 6

i already got that one. its c

Answer 7

great

Answer 8

and the other one?

Answer 9

well, any thoughts?

Answer 10

in order to get back where he started, he has to run the same distance in both directions

Answer 11

c?

Answer 12

yup

Answer 13

@Vocaloid

Answer 14

hint:

-10 - (-8) = -10 + 8 means we go 10 to the left, then 8 to the right

Answer 15

um, i land on 6

Answer 16

but theres no option for that answer.. @Vocaloid

Answer 17

try again...

-10 + 8 = ?

Answer 18

-2

Answer 19

right, so our answer is..?

Answer 20

b?

Answer 21

@Vocaloid

Answer 22

yes

Answer 23

2+(-7), means that I have to shift to right by 2 units, then I have to go to left by 7 units

Answer 24

so A?

Answer 25

so we have to move of 7 units from 2, to left

Answer 26

yes! correct!

Answer 27

6+(-7) means 6 units from origin to right and 7 units from the point x=6 to left

Answer 28

so A?

Answer 29

no, since in A both displacements are to right

Answer 30

oh sorry i meant b

Answer 31

correct!

Answer 32

Which of the following uses absolute value correctly to show the distance between −30 and 16?

|−30 − 16| = |−46| = −46 units
|−30 − 16| = |−46| = 46 units
|−30 + 16| = |−14| = 14 units
|−30 + 16| = |−14| = −14 units

Answer 33

what is -30-16=...?

Answer 34

-46

Answer 35

ok! now, please neglect the minus sign, what do you get?

Answer 36

so it would be b because the value is always positive

Answer 37

yes!

Answer 38

)Sandra is showing her work in simplifying (3.3 − 4.2) − 2.8 + 5.7. Identify any error in her work or reasoning.

Step 1: (3.3 − 4.2) − 2.8 + 5.7
Step 2: 3.3 + (− 4.2 − 2.8) + 5.7 (distributive property)
Step 3: 3.3 − 7 + 5.7
Step 4: 3.3 + 5.7 − 7 (commutative property)
Step 5: 9 − 7 = 2

She wrote commutative instead of associative in Step 4.
She wrote distributive instead of associative in Step 2.
She wrote commutative instead of distributive in Step 4.
She wrote distributive instead of commutative in Step 2.

Answer 39

at the step #2 the applied property is not the distributive property

Answer 40

is it b?

Answer 41

yes! we have applied the associative property

Answer 42

What is the sign of the product (−5)(−2)(−7)(−6)?

Positive, because the products (−5)(−2) and (−7)(−6) are negative and the product of two negative numbers is positive
Positive, because the products (−5)(−2) and (−7)(−6) are positive and the product of two positive numbers is positive
Negative, because the products (−5)(−2) and (−7)(−6) are negative and the product of two negative numbers is negative
Negative, because the products (−5)(−2) and (−7)(−6) are positive and the product of two positive numbers is negative

Answer 43

by the way, why you posted in history section?

Answer 44

oh i dont know sorry , ill change that after.. lol

Answer 45

lol :)

Answer 46

we have the subsequent rule:
\[\Large \left( - \right) \cdot \left( - \right) = + \]

Answer 47

so we have:
\[\Large \left\{ {\left( - \right) \cdot \left( - \right)} \right\} \cdot \left\{ {\left( - \right) \cdot \left( - \right)} \right\} = + \cdot + = + \]

Answer 48

b?

Answer 49

correct!

Answer 50

we can write this:
\[\Large \left( {\frac{{ - 1}}{2}} \right) \cdot \left( {\frac{{ - 1}}{2}} \right) = \left( { - \frac{1}{2}} \right) \cdot \left( { - \frac{1}{2}} \right) = ...?\]
also use the previous rule:
\[\Large \left( - \right) \cdot \left( - \right) = + \]

Answer 51

c?

Answer 52

yes!

Answer 53

we can write this:
\[\Large \begin{gathered}
- 5\frac{1}{4} = - \left( {5 + \frac{1}{4}} \right) = - \frac{{20 + 1}}{4} = ...? \hfill \\
\hfill \\
- 7\frac{1}{2} = - \left( {7 + \frac{1}{2}} \right) = - \frac{{14 + 1}}{2} = ...? \hfill \\
\end{gathered} \]
please complete

Answer 54

so i do this :
21/4 * 15/2

Answer 55

no, the single results are correct, nevertheless we have to do this:
\[ \Large - 5\frac{1}{4} - \left\{ { - 7\frac{1}{2}} \right\} = - \frac{{21}}{4} + \frac{{15}}{2} = \frac{{ - 21 + \left( {2 \cdot 15} \right)}}{4} = ...?\]

Answer 56

\[\large - 5\frac{1}{4} - \left\{ { - 7\frac{1}{2}} \right\} = - \frac{{21}}{4} + \frac{{15}}{2} = \frac{{ - 21 + \left( {2 \cdot 15} \right)}}{4} = ...?\]

Answer 57

i got 9/4

Answer 58

now, please complete this computation:
\[\Large 2\frac{1}{4} = 2 + \frac{1}{4} = \frac{{\left( {2 \cdot 4} \right) + 1}}{4} = ...?\]

Answer 59

i got 9/4

Answer 60

then what is the right option?

Answer 61

A?

Answer 62

correct!

Answer 63

is 2 and 1/4 positive or negative?

Answer 64

@Michele_Laino