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earnstyle [38]
3 years ago
10

What is the solution? A. 1.87 B. 1.61 C. 3.73 D. 1.13

Mathematics
1 answer:
quester [9]3 years ago
6 0
Try A:
6^(2*1.87) = 813.365

Try B:
6^(2*1.61) = 320.366

Try C:
6^(2*3.73) = 638275.725

Try D:
6^(2*1.13) = 57.362

Which one seems like the best answer?
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Which are the solutions of x2 = –7x – 8?
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Answer:

The solutions are:

x_1=\frac{-7+\sqrt{17}}{2}     x_2=\frac{-7-\sqrt{17}}{2}

Step-by-step explanation:

We have the following quadratic equation

x^2 = -7x - 8

We can rewrite the equation as follows

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Now we use the quadratic formula to solve the equation

For an equation of the form ax ^ 2 + bx + c = 0 the quadratic formula is:

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Then:

x=\frac{-7\±\sqrt{7^2-4(1)(8)}}{2(1)}

x=\frac{-7\±\sqrt{49-32}}{2}

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x_2=\frac{-7-\sqrt{17}}{2}

7 0
3 years ago
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Answer:

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Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
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<h3>let's solve:</h3>

according to the question

\begin{cases}x + 29 = 7x + 5 \\ 8y - 35 =3y  \end{cases}

\begin{cases}x -7x= 5-29 \\ 8y - 3y=35 \end{cases}

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\begin{cases}\frac{-6x}{-6}=\frac{-24}{-6} \\ \frac{5y}{5}=\frac{35}{5} \end{cases}

\therefore \begin{cases}  x=4\\ y=7 \end{cases}

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3 years ago
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