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Natali5045456 [20]
3 years ago
10

What is the answer please

Mathematics
1 answer:
il63 [147K]3 years ago
8 0

Answer:

submit search form of attract new you are doing well in the question

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The function Q(x)=2x^2-kx+18. For what value of k does Q(x) have one distinct real solution? (NEEDS TO BE DONE WITHIN 2 HOURS!)
Aliun [14]

Answer:

k = 12

Step-by-step explanation:

Given:

The equation Q(x)=2x^2-kx+18

To find:

Value of k = ? for which the given equation has one distinct real solution.

Solution:

The given equation is a quadratic equation.

There are always two solutions of a quadratic equation.

For the equation: ax^{2} +bx+c=0 to have one distinct solution:

b^2 - 4ac = 0

Here,

a = 2,

b = -k and

c = 18

Putting the values, we get:

(-k)^2 - 4\times 2\times 18 = 0\\\Rightarrow k^2 = 18\times 8\\\Rightarrow k^2 =144\\\Rightarrow k = 12

The equation becomes:

Q(x)=2x^2-12x+18

And the one root is:

2(x^2-6x+9 ) = 0\\\Rightarrow 2(x-3)^2=0\\\Rightarrow x = 3

4 0
3 years ago
What is the slope of a line that passes through the points (-3,-6) and (8, 16) ?
denis-greek [22]

Answer:

slope = 2

Step-by-step explanation:

3 0
3 years ago
What is the area of the shaded region plzz help
Aneli [31]

Answer:

78.10 cm^2

Step-by-step explanation:

The area of the shaded region is the area of the rectangle subtracted from the area of the circle.

area of circle = (pi)r^2

area of rectangle = LW

shaded area = area of circle - area of rectangle

shaded area = (pi)r^2 - LW

shaded area = (pi)r^2 - LW

shaded area = (3.14159)(6 cm)^2 - (7 cm)(5 cm)

shaded area = (3.14159)(36 cm^) - 35 cm^2

shaded area = 113.097 cm^2  35 cm^2

shaded area = 78.097 cm^2

Answer: 78.10 cm^2

3 0
3 years ago
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Find the surface area of a cylinder with a radius of 4 in and a height of 6 in.
Elodia [21]
The answer is 251.33in2 but, if those are your only 2 choices it would be the closest one to that number which is 251.20in2
6 0
3 years ago
Help please, I’m not sure
Lyrx [107]
YOUR ANSWER IS A
HOPE THIS HELPS
3 0
3 years ago
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