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qwelly [4]
3 years ago
9

Find the number of real number solutions for the equation.x2 − 2x + 9 = 0

Mathematics
1 answer:
Talja [164]3 years ago
4 0
Hi there!

We can use the discriminant of the quadratic formula to find the number of real solutions to this (or any other quadratic) equation.

The discriminant can be found by plugging in the data from the equation into the following formula:
d = {b}^{2} - 4ac \\ with \: y \: = a {x}^{2} + bx + c

When we fill in the data from the question we get
d = ( - 2) {}^{2} - 4 \times 1 \times 9 = 4 - 36 = - 32

Since d < 0 the equation has zero real solutions.
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Triangle FGH is reflected across a vertical line to produce ABC. Which statement is true
nadezda [96]

Answer:

answer is a

Step-by-step explanation:

answer would be a because a reflection does not change the size or shape of any figure

5 0
3 years ago
John has two colored varieties of water bottles: white water bottles and black water bottles . The total number of water bottles
Sedaia [141]

Answer:

he had about 17 or 18 black bottles.

Step-by-step explanation:

divide 35/2

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For all functions of the form f(x) = ax2 + bx + c, which is true when b = 0?
Klio2033 [76]
When b=0
f(x)=ax^2+c

test each
A. with x^2-1, A is false
B. with -x^2-1, B is false
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7 0
3 years ago
Read 2 more answers
Assume that we have two events, and , that are mutually exclusive. Assume further that we know and . If an amount is zero, enter
sweet [91]

Answer:

Explained below.

Step-by-step explanation:

The complete question is:

Assume that we have two events, A and B, that are mutually exclusive. Assume further that we know P(A) = 0.30 and P(B) =0.40.

What is P(A and B)?

What is P(A | B)?

Is P(A | B) equal to P(A)?

Are events A and B dependent or independent?

A student in statistics argues that the concepts of mutually exclusive events and independent events are really the same, and that if events are mutually exclusive they must be independent. Is this statement accurate?

What general conclusion would you make about mutually exclusive and independent events given the results of this problem?

Solution:

The probability of the two events <em>A</em> and <em>B</em> are:

P(A) = 0.30 and P(B) =0.40

(a)

Compute the value of P (A ∩ B) as follows:

P(A\cap B)=0

This is because mutually exclusive events are those events that cannot occur together.

(b)

Compute the value of P (A | B) as follows:

P(A|B)=\frac{P(A\cap B)}{P(B)}=\frac{0}{0.40}=0

Thus, the value of P (A | B) is 0.

(c)

No, P (A | B) is not equal to the P (A).

(d)

As mentioned in part (a), mutually exclusive events are those events which cannot occur together.

That is, P(A\cap B)=0.

Events A and B are independent  if the chance of their concurrent happening is equivalent to the multiplication of their distinct probabilities.

That is, P(A\cap B)=P(A)\times P(B).

The concepts of mutually exclusive events and independent events are not the same.

(e)

As the it is provided that A and B are mutually exclusive events, we know that P(A\cap B)=0.

Now compute the value of P(A)\times P(B) as follows:

               P(A)\times P(B)=0.30\times 0.40=0.12\neq 0

Thus, the events A and B are not independent.

Thus, if two events are mutually exclusive events they cannot be independent.

4 0
3 years ago
Please Help me, I will give brainiest and 100 points
8_murik_8 [283]

Answer:

3242

Step-by-step explanation:

6

7 0
2 years ago
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