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3 years ago

X-5 = 0 what is the real roots?

Mathematics

1 answer:

zavuch27 [327]3 years ago

7 0

Answer:

x=5

Step-by-step explanation:

add five to both sides and you get x=5

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3 years ago

After completing the square, what are the solutions to the quadratic equation

Fiesta28 [93]

Answer:

$x_1= \frac{\sqrt{{29}}}{2} +\frac{7}{2}\\\\x_2= -\frac{\sqrt{{29}}}{2} +\frac{7}{2}$

Step-by-step explanation:

1. Subtract 9 from both sides of the equation:

$x^2 - 7x+9-9 = 4-9\\\\x^2 - 7x= -5$

2. Notice that the coefficient of "x" is 7. Then:

$(\frac{7}{2})^2=\frac{49}{4}$

3. Add $\frac{49}{4}$ to both sides of the equation:

$x^2 - 7x+\frac{49}{4}= \frac{49}{4}-5\\\\x^2 - 7x+\frac{49}{4}= \frac{29}{4}$

4. Completing the square, you get:

$(x -\frac{7}{2})^2= \frac{29}{4}$

5. To find the solutions, you must square-root both sides of the equation, simplify, and solve for "x". Then, you get:

$\sqrt{(x -\frac{7}{2})^2}= \±\sqrt{\frac{29}{4}}\\\\x -\frac{7}{2}=\±\frac{\sqrt{{29}}}{2} \\\\x= \±\frac{\sqrt{{29}}}{2} +\frac{7}{2}\\\\\\x_1= \frac{\sqrt{{29}}}{2} +\frac{7}{2}\\\\x_2= -\frac{\sqrt{{29}}}{2} +\frac{7}{2}$

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3 years ago

Read 2 more answers

The odds are two to one that, when A and B play tennis, A wins. Suppose that A and B play two matches. What is the probability t

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Answer: 8/9

Step-by-step explanation:

Taking the probability as

AA = 4/9 AB = 2/9 BA = 2/9 BB = 1/9

These spaces AA,AB,BA,BB is indicates who wins each game.

There is a 2/3 probability that A will win any particular game.

But considering that these events are independent events, the probability that A wins both games is 2/3 and 2/3 which equals to 4/9.

Therefore the probability that A wins at least one match would be 1 − P(BB).

And this gives 1 - (1/9) =

8/9

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3 years ago

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Answer:

y = 25x + 40; $140

Step-by-step explanation:

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Vladimir [108]

Answer:

Step-by-step explanation:

The rate the jukebox is playing the same song is 8 per 50 songs or in other words 4 per 25 songs. Since we are looking for 75 just multiply 25 and 4 by 3 and you get 12 repeated songs per 75 songs

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3 years ago

X-5 = 0 what is the real roots?​

X-5 = 0 what is the real roots?