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Y_Kistochka [10]
3 years ago
14

Which of the following is not an attribute of parallelograms? A)Opposite sides are parallel. B)Consecutive angles are supplement

ary. C)Diagonals bisect each other. D)Diagonals are congruent. My answer is D..
Mathematics
1 answer:
AysviL [449]3 years ago
8 0

Answer:

the answer is D

Step-by-step explanation:

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Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.
jeka94

Answer:

x=4+2\sqrt{3}

x=4-2\sqrt{3}

Step-by-step explanation:

<u>Completing the square</u>

when  ax^2+bx+c=0

Given equation:

3x^2-24x+40=28

Subtract 40 from both sides:

\implies 3x^2-24x=-12

Divide both sides by 3:

\implies x^2-8x=-4

Add the square of half the coefficient of x to both sides:

(\frac{b}{2})^2=(\frac{-8}{2})^2=16

\implies x^2-8x+16=-4+16

Factor the left side and simplify the right side:

\implies (x-4)^2=12

Square root both sides:

\implies x-4=\pm\sqrt{12}

Add 4 to both sides and simplify the radical:

\implies x=4\pm\sqrt{4 \cdot 3}

\implies x=4\pm\sqrt{4}\sqrt{3}

\implies x=4\pm2\sqrt{3}

5 0
1 year ago
Find the measure of &lt;4.<br> {<br> 44<br> 158°<br> {<br> 44 = [?]
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Answer:

<4 = 22

Step-by-step explanation:

<4 = x

x + 158 = 180

x = 22

4 0
2 years ago
I cannot understand this please help ​
vaieri [72.5K]

Answer:

28 is the answers of the question

7 0
2 years ago
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