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elena-14-01-66 [18.8K]

3 years ago

6

Why must trapezoids be congruent

1 answer:

fredd [130]3 years ago

5 0

The diagonals of a trapezoid are only congruent (have the same length) if the trapezoid is an isosceles trapezoid.

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The graph 4x^2-4x-1 is shown. Use the grpah to find the estimates for the solutions of 4x^2-4x-1=0 and 4x^2 - 4x-1=2

Darina [25.2K]

Answer:

a) The estimates for the solutions of $4\cdot x^{2}-4\cdot x -1 = 0$ are $x_{1}\approx -0.25$ and $x_{2} \approx 1.25$ .

b) The estimates for the solutions of $4\cdot x^{2}-4\cdot x -1 = 2$ are $x_{1}\approx -0.5$ and $x_{2} \approx 1.5$

Step-by-step explanation:

From image we get a graphical representation of the second-order polynomial $y = 4\cdot x^{2}-4\cdot x -1$ , where $x$ is related to the horizontal axis of the Cartesian plane, whereas $y$ is related to the vertical axis of this plane. Now we proceed to estimate the solutions for each case:

a) $4\cdot x^{2}-4\cdot x -1 = 0$

There are two approximate solutions according to the graph, which are marked by red circles in the image attached below:

$x_{1}\approx -0.25$ , $x_{2} \approx 1.25$

b) $4\cdot x^{2}-4\cdot x -1 = 2$

There are two approximate solutions according to the graph, which are marked by red circles in the image attached below:

$x_{1}\approx -0.5$ , $x_{2} \approx 1.5$

5 0

3 years ago

I need help ASAP please

Vilka [71]

Answer:A -3,6

Step-by-step explanation: Substitue the answers in and they work out

3 0

3 years ago

Compute 1 + 2 + 3 +....+ 1,997 + 1,998 + 1,999

sp2606 [1]

Answer:

1 999 000

Step-by-step explanation:

Formula:

$1+2+3+.\ .\ .+n=\frac{n\times \left( n+1\right) }{2}$

………………………………………

Then

$1+2+3+....+1997+1998+1999=\frac{1999\times \left( 1999+1\right) }{2}$

$1+2+3+....+1997+1998+1999=\frac{1999\times \left( 2000\right) }{2}$

$1+2+3+....+1997+1998+1999=\frac{3998000 }{2}$

$1+2+3+....+1997+1998+1999=1999000$

7 0

2 years ago

2x + 6y = -18<br> --8x - y = 22<br><br> Please solve for me it’s due right now

Lady_Fox [76]

Answer:

(-57/23, - 50/23)

Step-by-step explanation:

equation form: x = -57/23, y = - 50/23

6 0

3 years ago

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7x + 8 + 3x2 - 5x + 9<br> Can someone show me how I would solve this equation? (Step by step please)

raketka [301]

Answer:

3 x^2 + 2 x + 17

Step-by-step explanation:

6 0

3 years ago

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