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ElenaW [278]
3 years ago
14

How would you solve 3x + y = -14

Mathematics
2 answers:
yanalaym [24]3 years ago
6 0

Answer:

X=

\frac{ - 23}{5}

Y=

\frac{ - 1}{5}

Step-by-step explanation:

3x+y=-14

2x-y=-9

5x=-23

y=

Effectus [21]3 years ago
6 0

Answer:

x= \frac{-23}{5}, y=\frac{-1}{5}

Step-by-step explanation:

3x + y = -14

-2x + y = 9

<em>We'll try to find x</em>

<em>(-2x + y = 9) multiplied by -1 => -1(-2x+y=9) =</em> <em>2x-y = -9</em>

<em></em>

3x + y = -14

+2x -y = -9

+__________

3x + 2x +y -y = -14 - 9

5x = -23

<em>x = -23/5</em>

3x + y = -14  =><em>And now we can find y. Just plug in -23/5 for x </em>

3\frac{-23}{5} + y = -14

\frac{-69}{5} + \frac{5y}{5}  = \frac{-70}{5}

\frac{5y}{5} =\frac{-1}{5}

5y = -1

<em>y = -1/5</em>

Hope this helps ^-^

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Evaluate f(x) = x^2 for f(-8).
taurus [48]

Answer:

f(-8) = 64

Step-by-step explanation:

The question is simply asking us to evaluate for f(x) when x = -8:

f(-8) = (-8)²

f(-8) = 64

5 0
4 years ago
37x -58 = 132 + 97x<br> Please help solve for x
Volgvan

Answer:

x = -19/6

Step-by-step explanation:

37x - 58 = 132 + 97x

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8 0
3 years ago
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What is the vertex for 1/8 y2 = x​
FrozenT [24]

Answer:

0,0

Step-by-step explanation:

Use desmos for things like this. It is a math graphing calculator that my algebra teacher showed me.

5 0
4 years ago
The perimeter of an ICU ward, that is rectangular in shape, is 258 feet. The width is 37 feet less than the length. Find the dim
zubka84 [21]

The dimensions of the rectangle is 83 feet x 46 feet

What is the Perimeter of a Rectangle?

The perimeter P of a rectangle is given by the formula, P = 2 ( L + W) , where L is the length and W is the width of the rectangle.

Perimeter P = 2 ( Length + Width )

Given data ,

The perimeter P of the rectangle = 258 feet

Let the length of the rectangle be = L

Let the width of the rectangle be = W

And , The width is 37 feet less than the length. ,

So , W = L - 37

Perimeter P = 2 ( Length + Width )

Substituting the values of L and W in the equation , we get

Perimeter P = 2 ( L + L - 37 )

2 ( L + L - 37 ) = 258

( L + L - 37 ) = 129

2L - 37 = 129

Adding 37 on both sides , we get

2L = 166

Divide by 2 on both sides , we get

Length L of the rectangle = 83 feet

Substituting the value of L in equation ,we get

W = L - 37

Width W of the rectangle = 46 feet

Therefore , Length = 83 feet and Width = 46 feet

Hence , the dimensions of the rectangle is 83 feet x 46 feet

To learn more about perimeter of rectangle click :

brainly.com/question/15725265

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3 0
2 years ago
Graph the system of equations: <br> y=-x^2+3x-1<br> 2y-1=x
Nana76 [90]
Y = -x² + 3x - 1
x = 2y - 1

  x = 2(-x² + 3x - 1) - 1
  x = 2(-x²) + 2(3x) + 2(-1) - 1
  x = -2x² + 6x - 2 - 1
  x = -2x² + 6x - 3
<u>- x              - x      </u>
  0 = -2x² + 5x - 3
  x = <u>-(5) +/- √((5)² - 4(-2)(-3))</u>
                        2(-2)
  x = <u>-5 +/- √(25 - 24)</u>
                   -4
  x = <u>-5 +/- √(1)
</u>              -4
  x = <u>-5 +/- 1</u>
             -4
  x = <u>-5 + 1</u>   or  x = <u>-5 - 1</u>
           -4                    -4
  x = <u>-4</u>              x = <u>-6</u>
        -4                    -4
  x = 1               x = 1.5

2y - 1 = x
2y - 1 = 1
<u>   + 1  + 1</u>
     <u>2y</u> = <u>2</u>
      2     2
       y = 1
 (x, y) = (1, 1)
or
2y - 1 = x
2y - 1 = 1.5
<u>    + 1 + 1    </u>
     <u>2y</u> = <u>2.5</u>
      2      2
       y = 1.25
 (x, y) = (1.5, 1.25)
The two solutions is equal to (1, 1) and (1.5, 1.25).
<u />
4 0
3 years ago
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