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Alex
3 years ago
12

What the perimeter of this

Mathematics
1 answer:
olga2289 [7]3 years ago
6 0
D) 142 (i can't make the square root symbol)

/18 = 3/2 
(3/2 + 4/2) x 2 = 14/2
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Determine between which consecutive integers the real zeros of y(x) = x2 - 4x – 2 are located.
Sholpan [36]

Answer:

The zeros are x1=4.45 and x2=-0.45.

x1 is between 4 and 5.

x2 is between -1 and 0.

Step-by-step explanation:

We have the function:

y(x) = x2 - 4x-2

As this is a quadratic function, we can calculate the zeros of the function with the quadratic equation:

x_{1,2}=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\\\x=\dfrac{-(-4)\pm\sqrt{(-4)^2-4\cdot 1\cdot(-2)}}{2\cdot 1}\\\\\\x=\dfrac{4\pm\sqrt{16+8}}{2}\\\\\\x=\dfrac{4\pm\sqrt{24}}{2}\\\\\\x=\dfrac{4\pm4.9}{2}=2\pm2.45\\\\\\x_1=2+2.45=4.45\\\\x_2=2-2.45=-0.45

The zeros are x1=4.45 and x2=-0.45.

x1 is between 4 and 5.

x2 is between -1 and 0.

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3 years ago
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63 first-graders and 21 other students attended a school assembly. What percentage of the
boyakko [2]

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75%

Step-by-step explanation:

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Order these numbers in order 0.5, 1 1/4, 0.25, 3/8
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the first answer common ratio is t2/t1=32/16

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