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Arlecino [84]
2 years ago
6

Need help pls I'm not good at math​

Mathematics
2 answers:
olga_2 [115]2 years ago
6 0

Answer:

Step-by-step explanation:

Subtract 9 on both sides

Kryger [21]2 years ago
4 0

Answer:

Subtract 9 from both sides

Step-by-step explanation:

....

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Limited time . 10 points
AfilCa [17]

Answer:

Therefore the value of x is

x=1\pm\sqrt{19}i

Step-by-step explanation:

Given:

x^{2}+20=2x which is

x^{2}-2x+20=0

To Find:

x = ? using Quadratic Formula

Solution:

For a Quadratic Equation ax² + bx + c = 0 , Formula Method is given as

x=\dfrac{-b\pm\sqrt{b^{2}-4ac}}{2a}

On Comparing with above we get

a=1\\b=-2\\c=20

Substituting a , b , c in Formula method we get

x=\dfrac{-(-2)\pm\sqrt{(-2)^{2}-4(1)(20)}}{2\times 1}\\\\x=\dfrac{2\pm\sqrt{-76}}{2}\\\\x=\dfrac{2\pm2\sqrt{19}i}{2}\\Dividing\ by\ 2\ we\ get\\\\x=1 \pm\sqrt{19}i

Therefore the value of x is

x=1\pm\sqrt{19}i

8 0
3 years ago
Given the following functions, evaluate f×g(7)
lidiya [134]

0

evaluate g(7) by substituting x = 7 into g(x

g(7) = (49-35-10)/2 = 4/2 = 2

now substitute x = 2 into f(x)

f(2) = √(4 - 48 + 144) = √0 = 0

(f ○ g)(7) = 0


3 0
3 years ago
2 1/7 + 9 15/28 + -9 5/14
Free_Kalibri [48]

Answer:

65/28 or 2 9/28

Step-by-step explanation:

Hope this helps!

3 0
3 years ago
Write an equation in slope-intercept form for the graph of<br> the line shown.<br> (y=mx+b)
Tamiku [17]
The answer for 25 is y=3x+1
The answer for 24 is y=3x+5
4 0
3 years ago
Tina has two rectangular playpens to keep her new pet dogs. The first rectangle has a width of 6 feet and a length of x - 4 feet
denpristay [2]

Answer:

4x+24 ft.

Step-by-step explanation:

Perimeter of first rectangular playpen mentioned: 2(6+x-4), which can be simplified to 2(x+2) = 2x + 4.

Perimeter of second playpen mentioned: 2(8+x+2), which can be simplified to 2(x+10) = 2x+20.

Add these two together: 2x+4 + 2x+20 = 4x+24. Don't forget to add units: 4x+24 ft.

3 0
3 years ago
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