anonymous
  • anonymous
help please!
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@Vocaloid
anonymous
  • anonymous
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
anonymous
  • anonymous
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.

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anonymous
  • anonymous
@Vocaloid
Vocaloid
  • Vocaloid
well, look at each of your answer choices... −1, 2 −2, 0 −2, 2 −1, 0 which answer choice adds up to 0?
anonymous
  • anonymous
i already got that one. its c
Vocaloid
  • Vocaloid
great
anonymous
  • anonymous
and the other one?
Vocaloid
  • Vocaloid
well, any thoughts?
Vocaloid
  • Vocaloid
in order to get back where he started, he has to run the same distance in both directions
anonymous
  • anonymous
c?
Vocaloid
  • Vocaloid
yup
anonymous
  • anonymous
@Vocaloid
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Vocaloid
  • Vocaloid
hint: -10 - (-8) = -10 + 8 means we go 10 to the left, then 8 to the right
anonymous
  • anonymous
um, i land on 6
anonymous
  • anonymous
but theres no option for that answer.. @Vocaloid
Vocaloid
  • Vocaloid
try again... -10 + 8 = ?
anonymous
  • anonymous
-2
Vocaloid
  • Vocaloid
right, so our answer is..?
anonymous
  • anonymous
b?
anonymous
  • anonymous
@Vocaloid
Vocaloid
  • Vocaloid
yes
anonymous
  • anonymous
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Michele_Laino
  • Michele_Laino
2+(-7), means that I have to shift to right by 2 units, then I have to go to left by 7 units
anonymous
  • anonymous
so A?
Michele_Laino
  • Michele_Laino
so we have to move of 7 units from 2, to left
Michele_Laino
  • Michele_Laino
yes! correct!
anonymous
  • anonymous
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Michele_Laino
  • Michele_Laino
6+(-7) means 6 units from origin to right and 7 units from the point x=6 to left
anonymous
  • anonymous
so A?
Michele_Laino
  • Michele_Laino
no, since in A both displacements are to right
anonymous
  • anonymous
oh sorry i meant b
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
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
Michele_Laino
  • Michele_Laino
what is -30-16=...?
anonymous
  • anonymous
-46
Michele_Laino
  • Michele_Laino
ok! now, please neglect the minus sign, what do you get?
anonymous
  • anonymous
so it would be b because the value is always positive
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
)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.
Michele_Laino
  • Michele_Laino
at the step #2 the applied property is not the distributive property
anonymous
  • anonymous
is it b?
Michele_Laino
  • Michele_Laino
yes! we have applied the associative property
anonymous
  • anonymous
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
Michele_Laino
  • Michele_Laino
by the way, why you posted in history section?
anonymous
  • anonymous
oh i dont know sorry , ill change that after.. lol
Michele_Laino
  • Michele_Laino
lol :)
Michele_Laino
  • Michele_Laino
we have the subsequent rule: \[\Large \left( - \right) \cdot \left( - \right) = + \]
Michele_Laino
  • Michele_Laino
so we have: \[\Large \left\{ {\left( - \right) \cdot \left( - \right)} \right\} \cdot \left\{ {\left( - \right) \cdot \left( - \right)} \right\} = + \cdot + = + \]
anonymous
  • anonymous
b?
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
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Michele_Laino
  • Michele_Laino
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: \[\Large \left( - \right) \cdot \left( - \right) = + \]
anonymous
  • anonymous
c?
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
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Michele_Laino
  • Michele_Laino
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
anonymous
  • anonymous
so i do this : 21/4 * 15/2
Michele_Laino
  • Michele_Laino
no, the single results are correct, nevertheless we have to do this: \[ \Large - 5\frac{1}{4} - \left\{ { - 7\frac{1}{2}} \right\} = - \frac{{21}}{4} + \frac{{15}}{2} = \frac{{ - 21 + \left( {2 \cdot 15} \right)}}{4} = ...?\]
Michele_Laino
  • Michele_Laino
\[\large - 5\frac{1}{4} - \left\{ { - 7\frac{1}{2}} \right\} = - \frac{{21}}{4} + \frac{{15}}{2} = \frac{{ - 21 + \left( {2 \cdot 15} \right)}}{4} = ...?\]
anonymous
  • anonymous
i got 9/4
Michele_Laino
  • Michele_Laino
now, please complete this computation: \[\Large 2\frac{1}{4} = 2 + \frac{1}{4} = \frac{{\left( {2 \cdot 4} \right) + 1}}{4} = ...?\]
anonymous
  • anonymous
i got 9/4
Michele_Laino
  • Michele_Laino
then what is the right option?
anonymous
  • anonymous
A?
Michele_Laino
  • Michele_Laino
correct!
anonymous
  • anonymous
is 2 and 1/4 positive or negative?
anonymous
  • anonymous
@Michele_Laino

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