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riadik2000 [5.3K]
3 years ago
10

Determine all values of k for which the roots of the equation x^2-6x+k=0 are complex

Mathematics
1 answer:
MaRussiya [10]3 years ago
6 0
Complex roots occur when b^2 - 4ac is negative.

So we have (-6)^2 - 4.1.k < 0
                      -4k < - 36
                       k > 9
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Help, and if you can give me a step by step explanation
Llana [10]

Answer:

the first option

Step-by-step explanation:

variability !

what does that word tell us ?

it means that there are more individuals differences.

you could also use "accuracy" as the opposite - we are aiming for the mean value ...

imagine some bow and arrow tournament.

who wins ?

the person with the highest accuracy across all the attempts (and that means the lowest variability in the results across all attempts relatively to the target center representing the predefined mean value).

now look at the graphic for neighborhood A.

and then for neighborhood B.

which one has the data points more clustered around the center (where the mean value is going to be) ? this one has lower variability than the one where the data points are having more than one cluster or are even all over the place.

remember, for the variability you have to add all the differences to the mean value. the smaller the differences to the mean value, the smaller the variability.

in neighborhood B almost all data points have a larger difference to the mean value.

so, the variability will be higher here.

5 0
2 years ago
On a single roll of a pair of dice, what are the odds against rolling a sum of 12?
o-na [289]

Answer:

\frac{1}{35}

Step-by-step explanation:

On a single roll of a pair of dice. When a pair of dice are rolled the possible outcomes are as follows:

(1,1)         (1,2)          (1,3)  (1,4)  (1,5)  (1,6)

(2,1)  (2,2)  (2,3)  (2,4)  (2,5)  (2,6)

(3,1)  (3,2)  (3,3)  (3,4)  (3,5)  (3,6)

(4,1)  (4,2)  (4,3)  (4,4)  (4,5)  (4,6)

(5,1)  (5,2)  (5,3)  (5,4)  (5,5)  (5,6)

(6,1)  (6,2)  (6,3)  (6,4)  (6,5)  (6,6)

The number of outcomes that gives us 12 are (6,6). There is only one outcome that gives us sum 12.

Total outcomes = 36

Odd against favor = \frac{non \ favorable\ outcomes}{favorable \ outcomes}

Number of outcomes of getting sum 12 is 1

Number of outcomes of not getting sum 12 is 36-1= 35

odds against rolling a sum of 12= \frac{1}{35}

3 0
3 years ago
What is the slope of a line that passes through the points (-2,3) and (4,-12)
posledela

Answer:

m = -5/2

Step-by-step explanation:

Solve for slope with the following equation:

<em>m </em>(slope) = (y₂ - y₁)/(x₂ - x₁)

Let:

(4 , -12) = (x₁ , y₁)

(-2 , 3) = (x₂ , y₂)

Plug in the corresponding numbers to the corresponding variables:

<em>m </em>= (3 - (-12))/(-2 - 4)

<em>m</em> = (3 + 12)/(-2 - 4)

<em>m </em>= (15)/(-6)

Simplify the slope:

<em>m</em> = -(15/6) = -5/2

-5/2 is your slope.

~

6 0
3 years ago
Read 2 more answers
Can you help me 2x+3y-x-(8+1)?
professor190 [17]

Answer: x+3y−9

Step-by-step explanation:

Simplify the expression.

I'd appreciate brainliest I need one more to get expert

8 0
2 years ago
Read 2 more answers
Predict the number of blue squares in a quilt with 11 green squares if there are 4 green squares in a quilt with blue squares.
attashe74 [19]

If you make the numbers into a ratio, it will be easier to find the answer.

There are 68 blue squares for the 4 green squares in the quilt.

68:4, or 68/4

If we do the division of the ratio, 68/4, we end up with 17.

Now, we multiply that by the 11 green squares of the new quilt.

17 x 11 = 187

3 0
2 years ago
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