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levacccp [35]
3 years ago
5

-5 5/7 +8 +( -3 2/7)

Mathematics
2 answers:
yulyashka [42]3 years ago
4 0
Step 1: Seperate the mixed numbers from their fractions.
- 5  - \frac{5}{7}  + 8  - 3 -  \frac{2}{7}
Step 2: Add -5 and -3. The sum of that is -8, thus we have an additive inverse. 8 and -8 cancel out, becoming a 0.
- 8 -  \frac{5}{7}  + 8 -  \frac{2}{7}  =    - \frac{5}{7}  -  \frac{2}{7}
\frac{ - 5 - 2}{7}  =  \frac{ - 7}{7}  =  - 1
Therefore, the answer is -1
posledela3 years ago
4 0

Answer:

-4+9 ------121222

Step-by-step explanation:


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Solve the system by substitution <br> -x-y-z=-8<br> -4x+4y+5z=7<br> 2x+2z=4 <br><br> show the work
Bezzdna [24]

<u>ANSWER </u>

x=3,y=6,z=-1

<u>EXPLANATION</u>

We the have the equations,

-x-y-z=-8

Multiplying through by negative one gives,


x+y+z=8---(1)

Also

-4x+4y+5z=7---(2)

and


2x+2z=4


Dividing through by 2 gives

x+z=2


Making z the subject  gives,

z=2-x---(3)


Now we substitute equation (3) into equation (1) and (2)


Equation (3) in to equation (1) gives,


x+y+2-x=8


This implies that;

y=8-2

y=6


We now put equation (3) in (2) to get,


-4x+4y+5(2-x)=7

This implies that

-4x+4y+10-5x=7


-9x+4y=7-10


-9x+4y=-3

But

y=6

So,

-9x+4(6)=-3


-9x+24=-3


-9x=-3-24


-9x=-27

Dividing through by negative 9 gives


x=3


and

z=2-3


z=-1


Therefore x=3,y=6,z=-1



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your answer is

<h2>a traepoizd </h2>

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<em><u>reason</u></em><em><u> </u></em>----

1 <em><u>parallelogram</u></em><em><u> </u></em>

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<h2>hope it's helpful thanks please mark me as brainlist please </h2>
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