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frosja888 [35]
3 years ago
8

Which properties justify the steps taken to solve the system?

Mathematics
1 answer:
max2010maxim [7]3 years ago
6 0

Answer:

Just took it!

Step-by-step explanation:

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PLEASE HELP FAST! I will give brainlist!
Whitepunk [10]

Answer:

D or A

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
X^2-10x+8=0 by completing the square
OverLord2011 [107]
When completing the square <span>x=9.12311 and </span><span>x=<span>0.876894</span></span>
4 0
3 years ago
Solve the equation -4x + 7 y equals 20. Y=3x+15
satela [25.4K]

Substitue what y equals for y and solve.

-4x+7(3x+15)=20 \\-4x+27x+105=20 \\23x=-85 \\x=-\boxed{\frac{85}{23}}

Hope this helps.

3 0
2 years ago
1) 1/3<br><br> 2)6<br><br> 3)-6 <br><br> 4)-3<br><br> 5)-1/3<br><br> 6) 3
slega [8]

Answer:

\frac{3}{1} or 3

Step-by-step explanation:

To find the slope find two coordinates and set up the equation \frac{y_{2}-y_{1}  }{x_{2} -x_{1} }

For the coordinates (0,2) and (2,8) y2 is 8 and y1 is 2. x2 is 2 and x1 is 0. \frac{8_{}-2_  }{2-0_ } you have to do subtraction first. 8-2 = 6 and 2-0 = 2

Now we have the equation \frac{6}{2}

this can be simplified to  \frac{3}{1}

6 0
2 years ago
Suppose the equation for line A is given by 2x = 5y – 25. If line A and B are perpendicular
Ludmilka [50]

The required equation of line B is 2y+5x=-2

The equation of a line in point-slope form is expressed as:

y-y0 = m(x-x0)

m is the slope of the line

(x0, y0) is the point on the line

Given the line A expressed as:

2x = 5y – 25

Rewrite in standard form

5y = 2x + 25

y = 2/5 x + 5

The slope will be 2/5

The slope of the perpendicular line will be;

M = \frac{-1}{(2/5)}\\M = \frac{-5}{2}

Substitute the point (-6, 14) and slope -5/2 into the equation above to get the required equation of line B

y-14=-5/2(x+6)\\2(y-14) = -5(x+6)\\2y-28=-5x-30\\2y+5x=-30+28\\2y+5x=-2\\

Hence the required equation of line B is 2y+5x=-2

Learn more here: brainly.com/question/13140886

6 0
3 years ago
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