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Allushta [10]
3 years ago
10

Describe the solutions for the quadratic equation shown below:

Mathematics
1 answer:
PtichkaEL [24]3 years ago
5 0

The solutions for the quadratic equation 9x² - 6x + 5 = 0 are A. 2 complex roots

To determine the the type of roots the quadratic equation 9x² - 6x + 5 = 0, we use the quadratic formula to find the roots.

So, for a quadratic equation ax + bx + c = 0, the roots are

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

With a = 9, b = -6 and c = 5, the roots of our equation are

x = \frac{-(-6) +/- \sqrt{(-6)^{2} - 4 X 9 X 5} }{2 X 9} \\x = \frac{6 +/- \sqrt{36 - 180} }{18} \\x = \frac{6 +/- \sqrt{-144} }{18} \\x = \frac{6 +/- \sqrt{-12} }{18}\\x = \frac{6}{18} +/- i\frac{12}{18} \\x = \frac{1}{3} +/- i\frac{2}{3} \\x = \frac{1 + 2i}{3}  or \frac{1 - 2i}{3}

Since the roots of the equation are (1 + 2i)/3 and (1 - 2i)/3, there are 2 complex roots.

So, the solutions for the quadratic equation 9x² - 6x + 5 = 0 are A. 2 complex roots

Learn more about quadratic equations here:

brainly.com/question/18117039

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bezimeni [28]

Answer:

2 ; -2

Step-by-step explanation:

Both numbers squared equal 4

8 0
2 years ago
This is a math question ,plzzz help me
Mekhanik [1.2K]
Lokman contributed 3x   (21 000)
Muin contributed 2x
Nordin contributed 5x

3x = 21 000
x = 21 000 / 3
x = 7 000

Total price of a land = 3x + 2x + 5x = 10x = 10 * 7 000 = 70 000

Profit = 85 000 - 70 000 = 15 000

Lokman's profit = 2y
Muin's profit = y
Nordin's profit = 3y

Total profit = 2y + y + 3y = 6y

6y = 15 000
y = 15 000 / 6
y = 2 500

Muin's profit = y = 2 500

Hope that helps.
4 0
3 years ago
The volume (V) of water stored in an open tank varies due to evaporation as V = xÊ – 50xÆ + 700, where V is expressed in gallons
blondinia [14]
The answer 45 and the other one to the question is invalid
5 0
4 years ago
Alex scored 98,72, and 87 on his first three math test. What must he score on the next test to have an average of at least 86 (P
ss7ja [257]

Answer:

\huge\boxed{\text{At least an } 87\%}

Step-by-step explanation:

In order to find what score Alex must earn to have an average of 86 on all his tests, we need to first note what the formula to find the average of a data set is.

\displaystyle \frac{x_1+x_2+...x_n}{n}

What the formula means is that we have to add up all the values then divide by the total number of values.

Let's represent our unknown number as x.

\displaystyle \frac{98+72+87+x}{4} \geq 86 (since we want AT LEAST an 86).

Let's solve this inequality for x.

  • \frac{98+72+87+x}{4} \cdot 4 \geq 86 \cdot 4
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So, Alex must score at least an 87% on his next quiz to have an average of 86%.

Hope this helped!

8 0
3 years ago
A wheel has a diameter of 21 inches. Approximately how far does it travel in 3 revolutions? A. 63 in. B. 65.94 in. C. 98.91 in.
Paul [167]
If a wheel makes a full turn, it will have traveled the entire distance around that wheel. After 3 revolutions, it should have traveled 3 times its circumfrence.
The circumfrence of a circle is equal to the diameter times pi. (about 3.14)
21 × 3.14 = 65.94 = circumfrence = 1 revolution
3 revolutions = = 65.94 × 3 = D. 197.82 in.
8 0
3 years ago
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