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3 years ago

5

Follow the process of completing the square to solve x^2 - 10x + 8 = 0. What is the value of the constant that will be isolated

on the right side of the equation in step 3? A.-8 B.-12 C.-32

2 answers:

bulgar [2K]3 years ago

7 0

Answer:

A. -8

Step-by-step explanation:

$x^2-10x+8=0$

then we subtract 8 from both sides

$x^2-10x+8-8=0-8$

$x^2-10x=-8$

The value on the right side is -8 in the process of completing the square.

yKpoI14uk [10]3 years ago

7 0

Answer:

A. -8

Step-by-step explanation:

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4 years ago

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After being treated with chemotherapy, the radius of the tumor decreased by 23%. What is the corresponding percentage decrease i

Crazy boy [7]

Answer:

The volume of the tumor experimented a decrease of 54.34 percent.

Step-by-step explanation:

Let suppose that tumor has an spherical geometry, whose volume ( $V$ ) is calculated by:

$V = \frac{4\pi}{3}\cdot R^{3}$

Where $R$ is the radius of the tumor.

The percentage decrease in the volume of the tumor ( $\%V$ ) is expressed by:

$\%V = \frac{\Delta V}{V_{o}} \times 100\,\%$

Where:

$\Delta V$ - Absolute decrease in the volume of the tumor.

$V_{o}$ - Initial volume of the tumor.

The absolute decrease in the volume of the tumor is:

$\Delta V = V_{o}-V_{f}$

$\Delta V = \frac{4\pi}{3}\cdot (R_{f}^{3}-R_{o}^{3})$

The percentage decrease is finally simplified:

$\%V = \left[1-\left(\frac{R_{f}}{R_{o}}\right)^{3} \right]\times 100\,\%$

Given that $R_{o} = R$ and $R_{f} = 0.77\cdot R$ , the percentage decrease in the volume of tumor is:

$\%V = \left[1-\left(\frac{0.77\cdot R}{R}\right)^{3} \right]\times 100\,\%$

$\%V = 54.34\,\%$

The volume of the tumor experimented a decrease of 54.34 percent.

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3 years ago

Hector works in a gas station and earns $15.50 per hour. Last week he worked 29 hours. What was his gross pay?

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Answer:

449.50

Step-by-step explanation:

because gross pay is before taxes and everything else and he worked 29 hours so 15.50 × 29 = $449.50

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4 years ago

23 > 4n + 11 two step inequality

drek231 [11]

Solving the inequality: $23>4n+11$ we get $n$

Step-by-step explanation:

We need to solve the inequality: $23>4n+11$

Solving the inequality:

Switch the sides and reverse the inequality:

$4n+11$

Subtract 11 from both sides

$4n+11-11$

$4n$

Divide both sides by 4

$n$

$n$

So, solving the inequality: $23>4n+11$ we get $n$

Keywords: Solving inequalities

Learn more about Solving inequalities at:

#learnwithBrainly

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