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Klio2033 [76]
3 years ago
9

What is the value of the discriminant for the quadratic equation 0 = x + 2 + x^2?

Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0

Answer:

The discriminant of the quadratic equation is -7.

Step-by-step explanation:

We are given the following quadratic equation in the question:

x^2+x+2 = 0

Comparing to general quadratic equation:

ax^2+bx+c = 0\\a = 1\\b = 1\\c = 2

We have to find the discriminant of the quadratic equation.

Formula:

d = b^2-4ac

Putting values, we get,

d = (1)^2 - 4(1)(2) = 1 - 8 = -7

Thus, the discriminant of the quadratic equation is -7.

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A lottery game has balls numbered 1 through 21. What is the probability of selecting an even numbered ball or an 8? Round to nea
Viktor [21]

Answer: 0.476

Step-by-step explanation:

Let A = Event of choosing an even number ball.

B = Event of choosing an 8 .

Given, A lottery game has balls numbered 1 through 21.

Sample space: S= {1,2,3,4,5,6,7,8,...., 21}

n(S) = 21

Then, A= {2,4,6,8, 10,...(20)}

i.e. n(A)= 10

B= {8}

n(B) = 1

A∪B = {2,4,6,8, 10,...(20)} = A

n(A∪B)=10

Now, the probability of selecting an even numbered ball or an 8 is

P(A\cup B)=\dfrac{n(A\cup B)}{n(S)}

=\dfrac{10}{21}\approx0.476

Hence, the required probability =0.476

7 0
3 years ago
A baseball bat costs $41. This is $9 more than four times the wholesale cost of the bat.Find the bat's wholesale cost.
Lostsunrise [7]

We can find the bat's wholesale cost by working backwards -

Do $41 - 9 to get $32, then we can divide the 32 by the 4 to get $8.

Therefore, the wholesale cost of the bat is $8.


Happy to help!

7 0
2 years ago
Read 2 more answers
Which of the following is a characteristic of the circumcenter of a triangle? A. It is the center of the circle that can be insc
ki77a [65]
Answer is A. It is the center of the circle that can be inscribed in a given triangle
Explanation
The circumcenter is called ”the circumcenter” because it is the center of the circle that ”circumscribes” the triangle.
6 0
2 years ago
What is the answer plzzzzzz help a kid out
Komok [63]

Answer:

the answer is 8 by one of this question.

4 0
4 years ago
((7, 6), (0,-1), (-7, -1), (-3, 2), (-5, 3) } Domain. Range​
Olin [163]
The domain is {-7,-5,-3,0,7}.
The range is {-1,-1,2,3,6}.
:) hope you get a good grade.
4 0
3 years ago
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