1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hram777 [196]
3 years ago
10

What is the value of the discriminant? 2K2 = 10k - 2

Mathematics
1 answer:
Phoenix [80]3 years ago
7 0

Answer:

84

Step-by-step explanation:

Given a quadratic equation in standard form, ax² + bx + c = 0 : a ≠ 0

Then the discriminant is Δ = b² - 4ac

2k² = 10k - 2 ( subtract 10k - 2 from both sides )

2k² - 10k + 2 = 0 ← in standard form

with a = 2, b = - 10 and c = 2, thus

b² - 4ac = (- 10)² - (4 × 2 × 2) = 100 - 16 = 84

You might be interested in
9. If the area of square 1 is 250 units?, and the area of square 3 is
Aleks [24]

Answer:

185 units.

Step-by-step explanation:

So first, I subtracted: 250 - 120 = 130

I divided 130 by 2. I got 65.

I subtracted 65 from 250 and I got 185.

Proof it is correct:

185 - 120 = 65

AND

250 - 185 = 65

--

5 0
3 years ago
I need help please & thx
kicyunya [14]

13. y > 2

14. x - 13 < 9;; x < 22

15. x + 86 < 263;; at most 177 pounds

3 0
3 years ago
(3 points) Blades of grass Suppose that the heights of blades of grass are Normally distributed and independent, with each heigh
NemiM [27]

The final answer is:

a) P( Y < 42.5 )  = 0.8541

b) P( 39.5 < Y < 40.5 ) = 0.1670.

What is the normal distribution?

A continuous probability distribution for a real-valued random variable in statistics is known as a normal distribution or Gaussian distribution.

If x follows a normal distribution with mean μ and standard deviation σ then the distribution of

\sum_{i =1}^{n}x_{i}  follows an approximately normal distribution with a mean n\mu and standard deviation \sqrt{n }\sigma

let x be the height of blades of grass

x follows normal distribution with mean = μ = 4 and standard deviation = σ = 0.75.

Y = x1 + x2 +...........+x10

Y = \sum_{i =1}^{10}x_{i}

Distribution of Y is normal with,

Mean = \mu _{y}=10*4 = 40 and standard deviation = \sigma _{y}=\sqrt{10}*0.75 = 2.3717

a)

P( Y < 42.5 )

Using normal distribution formmula,

f(x)= {\frac{1}{\sigma\sqrt{2\pi}}}e^{- {\frac {1}{2}} (\frac {x-\mu}{\sigma})^2}

=NORMDIST( x, mean, SD , 1 )      

=NORMDIST(42.5, 40, 2.3717, 1 )

=0.8541

P( Y < 42.5 )  = 0.8541

b)

P( 39.5 < Y < 40.5 ) = P( Y < 40.5 ) - P( Y < 39.5 )

Using normal distribution formmula,

f(x)= {\frac{1}{\sigma\sqrt{2\pi}}}e^{- {\frac {1}{2}} (\frac {x-\mu}{\sigma})^2}

P( Y < 40.5 )  =NORMDIST(40.5, 40, 2.3717, 1 ) = 0.5835

P( Y < 39.5 ) = NORMDIST(39.5, 40, 2.3717, 1 ) = 0.4165

P( 39.5 < Y < 40.5 ) = 0.5835 - 0.4165  = 0.1670

P( 39.5 < Y < 40.5 ) = 0.1670

Hence, the final answer is:

a) P( Y < 42.5 )  = 0.8541

b) P( 39.5 < Y < 40.5 ) = 0.1670.

To learn more about the normal distribution visit,

brainly.com/question/4079902

#SPJ4

5 0
1 year ago
Help with math please?
Snowcat [4.5K]
In the first box is 2.
second box 1.
third 4.
fourth 5. 
fifth 3.
6 0
3 years ago
Read 2 more answers
Write 2 over 5,11 over 30,1 over 2,7 over 15 from smallest to largest
miss Akunina [59]

DUDE just take a snip it or picture of the question and send it and then ill gve u the answer

6 0
3 years ago
Other questions:
  • Which algebraic expression models the word phrase three fewer than the sum of c and d?
    13·1 answer
  • In speed skating, the distance of 10,000 meters consists of 25 laps. A skater sets the
    14·1 answer
  • Find the factors from the roots, then multiply the factors together.<br> y=x3−3.5x2+3.5x−1
    6·1 answer
  • Find the coordinate that divides the directed line segment from A(-2,-4) to B(8,1) in the ratio of 2 to 3
    11·1 answer
  • Sorry I don't know what to post this in but I will give BRAINLIEST Max kept 100 grams of radioactive iodine in a container. He o
    7·1 answer
  • Need help with 5 6 7 and 8. at least answer one of them .
    8·1 answer
  • Order the following rational numbers from least to greatest: 0.1, 1/5, 0.01, 1/8
    9·1 answer
  • An online music store offers 2 downloads for $7.50. Another online music store offers 12 downloads for $20.20 which store offers
    5·1 answer
  • what is the equation in point-slope form of the line that passes through the point (4, "-7)" and has a slope of "-1/4"
    5·1 answer
  • If an object travels at 15 feet per minute, how many feet does it travel in 1.5 seconds
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!