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AfilCa [17]
3 years ago
5

Well I'm having troubles with something I have no idea what it is or how to do it. The problem is x^2 -18x+8=0. I only know how

to set it up. I know that you group the x^2=0 and -18x+8=0
Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
6 0

Answer:

x = \frac{-(-18) -\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 -2 \sqrt{73}}{2}= 9 -\sqrt{73}

x = \frac{-(-18) +\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 +2 \sqrt{73}}{2}= 9 +\sqrt{73}

Step-by-step explanation:

We have the following equation:

x^2 -18 x +8 =0

We can use the quadratic formula given by:

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

Where:

a = 1 , b=-18, c =8

And replacing we got:

x = \frac{-(-18) -\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 -2 \sqrt{73}}{2}= 9 -\sqrt{73}

x = \frac{-(-18) +\sqrt{(-18)^2 -4*1*8}}{2} = \frac{18 +2 \sqrt{73}}{2}= 9 +\sqrt{73}

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A new car is purchased for 17000 dollars. The value of the car depreciates at 12.25% per year. What will the value of the car be
Scilla [17]

Answer:

P(t=14) = 17000 (1-0.1225)^{14}= 2728.404

Step-by-step explanation:

for this case we have the following model for the cost of the car:

P(t) = P_o (1-r)^t

Where P_o is the initial amount on this case 17000, t the amount of years after the initial year and r the depreciation rate on this case:

r= \frac{12.25}{100}=0.1225

And for t =14 we can replace into the equation and we got:

P(t=14) = 17000 (1-0.1225)^{14}= 2728.404

5 0
3 years ago
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Mashcka [7]

Answer:The slant height of the top is 5 m, and the height of the cylinder is 9 m. Find the distance between P and Q, to the nearest cm. 0 height of small triangle.

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2 years ago
Find the distance between each pair of points.<br> 3) (6, -2), (8, -3)<br> 4) (7,-8), (-8, 2)
castortr0y [4]

Answer:

3) \sqrt{5}

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Step-by-step explanation:

distance between two points:

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we have:

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3 years ago
9. Stephanie gets her hair cut every 42 days. Her sister goes to the
Fiesta28 [93]

Answer:

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Step-by-step explanation:

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3 years ago
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3 years ago
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