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sp2606 [1]
3 years ago
7

Solve the system using the elimination method.

Mathematics
2 answers:
Taya2010 [7]3 years ago
7 0
By adding the 1st and third equation together, you get rid of z and end with 7x+8y=13. The second equation will be the second equation and 2 times the first equation, so the will yield 3x+8y=1. Now, you solve this system of equations and get x3, y=-1, and z=-4
eimsori [14]3 years ago
4 0

Answer:

That's wrong...

Solve using determinants:

x + 4y − z = −14  

5x + 6y + 3z = 4  

−2x + 7y + 2z = −17

|A| =  -120  

|Ax| =  -240

|Ay| = 360  

|Az| = -480  

x =  2

y = -3  

z =  4

Step-by-step explanation:

Solving a 3 x 3 Linear System Using Cramer's Rule

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7 + 4 + -8 + -7 + -5 + 2=?<br><br> Is the answer -7?
balandron [24]

Answer:

Yes

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
3. Write an equation of a line that is perpendicular to the line x – 2y = 8.
xenn [34]

Answer:

y=0.5x+40

Step-by-step explanation:

Copy the  equation.

x-2y=8

Subtract x from both sides.

-2y=-x-8

Divide both sides by -2.

y=0.5x+4

Now we know the slope is 0.5.

Any line with a slope of 0.5 will be perpendiculr to the original line.

One that you can use is y=0.5x+40.

7 0
4 years ago
Write the equation of the line in standard form passing through (2,-4) with a slope of -7​
otez555 [7]

Answer:

7x+Y=-2

Step-by-step explanation:

(y-y1)=m(x-x1)

(Y+4)=-7(x-2)

Y+4=-7x+2

Y+7x=2-4

7x+Y=-2

5 0
3 years ago
I need help with 12, 13, 14, and 15
frutty [35]
Number 12 what do you think we do first
6 0
4 years ago
Please help!!!!!!!!!!!!!!!!!!!!!
3241004551 [841]

Answer:

C and D

Step-by-step explanation:

1

The arc length is calculated as

arc = circumference of circle × fraction of circle

     = 2πr × \frac{60}{360}

     = 2π × 10 × \frac{1}{6} = \frac{20\pi }{6} = \frac{10\pi }{3} cm → C

-----------------------------------------------------

2

The area (A) of a sector is calculated as

A = area of circle × fraction of circle

   = πr² × \frac{60}{360}

   = π × 10² × \frac{1}{6} = \frac{100\pi }{6} = \frac{50\pi }{3} cm² → D

6 0
3 years ago
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