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
lilavasa [31]
3 years ago
11

3. The variance of a set of positive numbers p.(p-5).(p-2), (p-3) (2p-5)is 5.84.

Mathematics
1 answer:
sweet [91]3 years ago
6 0

Answer:

(a) p = 7

Step-by-step explanation:

The given parameters are;

p, (p - 5), (p - 2), (p - 3), and (2·p - 5) is 5.84

(a) Therefore we have;

The mean of the numbers = (p + (p - 5) + (p - 2) + (p - 3) + (2·p - 5))/5 = (6·p - 15)/5

The mean of the numbers = (6·p - 15)/5 = 6/5·p - 3

Using an online tool, we have;

The variance = (p - (6/5·p - 3))² + ((p - 5) - (6/5·p - 3))² + ((p - 2) - (6/5·p - 3))² + ((p - 3) - (6/5·p - 3))² + ((2·p - 5) - (6/5·p - 3))²/5 = 4/25·p² - 4/5·p + 18/5 = 5.84

Therefore, we have;

4/25·p² - 4/5·p + 18/5 = 5.84

4/25·p² - 4/5·p + 18/5 - 5.84 = 0

4/25·p² - 4/5·p - 2.24 = 0

Using the quadratic formula, we have;

p = (4/5 ± √((4/5)² - 4× 4/25×(-2.24)))/(2 × 4/25)

Which gives;

p = 7, or p = -2

Given that the numbers are positive, we have the only solution as p = 7

You might be interested in
A triangle has one acute angle as the complement of the other. find the third angle​
Bogdan [553]

Answer: 90 degrees

Step-by-step explanation:

Complementary angles add up to 90 degrees. Since a triangle has 180 degrees total, the other angle is 90 degrees

8 0
2 years ago
Read 2 more answers
Help ASAP ! Show work
DanielleElmas [232]

Answer:

Step-by-step explanation:

Using formula a^{2} + b^{2} =c^{2}

a= 650

b= 800

and c is the unkown

8 0
3 years ago
Work out the number of boys and girls in each class below.
Brums [2.3K]

Answer:

Work out the number of boys and girls in each class below.

In class 8T, there are 9 boys.

The ratio of boys to girls is 1:2

Number of boys Number of girls = it's 0

8 0
2 years ago
What is f(8)=0.8(8)^2
Montano1993 [528]

Answer:

f = 5.12

Step-by-step explanation:

f(8)=0.8(8)^2

f(8)=6.4^2

f(8)=40.96

f(8)/8 = 40.96/8

f = 5.12

i'd really appreciate being marked brainliest if you want! i appreciate it :)

7 0
3 years ago
Umm I don’t understand this question
antiseptic1488 [7]
What's 24 in it's so ole way? 6
what's 28 in it's simplest way?9
4 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP!! I can't figure this out
    14·2 answers
  • Step by step 3(4d+1)-9d=6(2-d)
    6·2 answers
  • What is 12 divided by 3/4
    13·2 answers
  • What is the value of x?
    11·1 answer
  • What is 4/5 divided by 8
    5·1 answer
  • Quadrilateral ABCD is reflected across the x-axis and then reflect across the y-axis to form quadrilateral A′B′C′D′. If the coor
    14·1 answer
  • Jasmine earns an annual salary of $45609, as a therapist. How much does she earn per month?
    13·2 answers
  • What is 15 divided by 1/5?
    10·2 answers
  • The equation below describes a proportional relationship between x and y. What is the constant of​ proportionality?
    9·1 answer
  • The Romano family pays for a streaming movie service that costs
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!