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kykrilka [37]
2 years ago
10

Please help(ik it’s not c)

Mathematics
2 answers:
Talja [164]2 years ago
6 0
The answer is A. 45 degrees
ICE Princess25 [194]2 years ago
6 0

Answer:

Its A

Step-by-step explanation:

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For which positive integer values of $k$ does $kx^2+20x+k=0$ have rational solutions? Express your answers separated by commas a
Musya8 [376]

Answer:

-10,10

Step-by-step explanation:

The given quadratic equation is

k {x}^{2}  + 20x + k = 0

The discriminant of this equation is given by;

D =  {b}^{2}  - 4ac

where a=k, b=20, c=k

For rational solutions, the discriminant must be zero.

{20}^{2}  - 4 \times k \times k = 0

Simplify to get:

400 - 4  {k}^{2}  = 0

This implies that:

400  = 4  {k}^{2}

100 =  {k}^{2}

Take square root to get:

k =   \pm\sqrt{100}

k =  \pm10

k =  - 10 \: or \: k = 10

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2 years ago
Find the equation of the line that contains the point (4, - 2) and is perpendicular to the line y = - 2x + 5. ​
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<h3>Answer:</h3>

y=1/2x

<h3>Solution:</h3>
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Hope it helps.

Do comment if you have any query.

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