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Over [174]
4 years ago
15

Use the discriminant and select whether the roots of 5x 2 - 4x + 3 = 0 are real or non-real. real

Mathematics
2 answers:
vampirchik [111]4 years ago
8 0

Answer:false

Step-by-step explanation:

none

valkas [14]4 years ago
3 0
The discriminant of a quadratic equation is calculated through the equation,
                                   D = b² - 4ac 
In the given above, a = 5, b = -4, and c = 3. Substituting these values to the equation,
                                   D = (-4)² - 4(5)(3) = -44
Since the discriminant is negative, the roots are non-real.
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Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms lon
harina [27]

Answer:

14.6 minutes

Step-by-step explanation:

Since there is a 1 ms increase per day and there are 365 days a year, the time increase per year is 1 ms/day × 365 days/year = 365 ms/year.

So, in 24 centuries, there are 24 × 1 century = 24 × 100 years = 2400 years (since  1 century = 100 years)

So, the total of the daily increase in time in 24 centuries is time increase per year × 24 centuries

= 365 ms/year × 2400 years

= 876000 ms

= 876 s

= 876 s/60s

= 14.6 minutes

5 0
3 years ago
Suppose Julio is a veterinarian who is doing research into the weight of domestic cats in his city. He collects information on 1
fomenos

Answer:

Estimate of the standard error of the mean = 0.38 lb

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} = 10.87 lb

Sample size, n = 131

Standard deviation, σ = 4.31 lb

We have ti find the estimate of the standard error of the mean.

Formula for standard error:

S.E= \dfrac{\sigma}{\sqrt{n}}

Putting values, we get,

S.E = \dfrac{4.31}{\sqrt{131}} = 0.3766 \approx 0.38

0.38 lb is the standard error of the mean.

7 0
3 years ago
Most of the heat loss for outdoor swimming pools is due to surface
fgiga [73]

Answer:

rectangle

Step-by-step explanation:

Perimeter of 20 feet

rectangle (square is technically a rectangle):

sides 5 and 5

5*5 = 25ft²

Circle:

20/(2π) = 3.18309...

3.1809...²π = 31.831ft²

Max area of rectangle (i.e. square) has a smaller area than a circle.

5 0
3 years ago
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weeeeeb [17]
M=4
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3 0
3 years ago
Oncepts in Probability and Statistics - MA3120 A-CR-2021010
shepuryov [24]

Answer:

I see..

Step-by-step explanation:

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4 0
3 years ago
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