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larisa86 [58]
3 years ago
13

Which of the following statements explains why 0.8 is or is not a rational number?

Mathematics
1 answer:
noname [10]3 years ago
7 0

Answer:

a

Step-by-step explanation:

its 8 bc when u put it under 9 it repeats

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What are the exact solutions of x^2 − 3x − 7 = 0?
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<u>Given</u>:

The given equation is x^{2} -3x-7=0

We need to determine the exact solutions of the equation.

<u>Exact solution:</u>

The exact solution of the equation can be determined by solving the equation using quadratic formula,

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

From the equation the values are a = 1, b = -3 and c = -7

Thus, substituting these values in the equation, we get;

x=\frac{-(-3) \pm \sqrt{3^2-4(1)(-7)}}{2(1)}

x=\frac{3 \pm \sqrt{9+28}}{2}

x=\frac{3 \pm \sqrt{37}}{2}

Thus, the exact solutions of the given equation is x=\frac{3 \pm \sqrt{37}}{2}

Hence, Option A is the correct answer.

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Answer:

978 in^2

Step-by-step explanation:

the area of the rectangle:

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