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
ella [17]
3 years ago
9

On a multiple choice test with 17 questions, each question has four possible answer, one of which is correct. For students who g

uess at all answers, find the mean for the number of correct answers.
a. 12.8
b. 8.5
c. 4.3
d. 5.7
Mathematics
1 answer:
Virty [35]3 years ago
3 0

Answer:

C. 4.3

Step-by-step explanation:

Given that

n = 17

P = 1/4

Using binomial

Mean = np

Mean = 17 × (1/4)

= 17 × .25

= 4.25

Approximately = 4.3

You might be interested in
Find an irrational number that is between 5.2 and 5.5. Explain why it is irrational. Include the decimal approximation of the ir
alexgriva [62]

Answer:

An apple, potato, and onion all taste the same if you eat them with your nose plugged

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Robin surveyed 5 students from the choirs of 4 different schools. He asked them how many hours they practice singing each day. S
Fittoniya [83]

Answer:

The highest would be the letter B and the lowest would be letter C if the pat is what you need to know.

Hope it helps :)

3 0
3 years ago
The sum of the three consecutive integers is -27. What is the product of the smallest and largest of the three integers?
Aleksandr [31]

Answer:

B. 80

Step-by-step explanation:

3 consecutive integers: x-1 , x , x+1

(x-1) + x + (x+1) = -27

3x = -27

x = -9

smallest: -9-1 : -10

largest: -9+1 : -8

product of the smallest and largest of the three integers: (-10)*(-8)=80

4 0
3 years ago
Which sign makes this number sentence true?
I am Lyosha [343]

Answer:

C. =

Step-by-step explanation:

whenever you have |  | It will always be positive so -6 turns to 6 and that makes it equal.

4 0
3 years ago
Need help please, does any one know how to do this​
ziro4ka [17]

Answer:

  • (6-u)/(2+u)
  • 8/(u+2) -1
  • -u/(u+2) +6/(u+2)

Step-by-step explanation:

There are a few ways you can write the equivalent of this.

1) Distribute the minus sign. The starting numerator is -(u-6). After you distribute the minus sign, you get -u+6. You can leave it like that, so that your equivalent form is ...

  (-u+6)/(u+2)

Or, you can rearrange the terms so the leading coefficient is positive:

  (6 -u)/(u +2)

__

2) You can perform the division and express the result as a quotient and a remainder. Once again, you can choose to make the leading coefficient positive or not.

  -(u -6)/(u +2) = (-(u +2)-8)/(u +2) = -(u+2)/(u+2) +8/(u+2) = -1 + 8/(u+2)

or

  8/(u+2) -1

Of course, anywhere along the chain of equal signs the expressions are equivalent.

__

3) You can separate the numerator terms, expressing each over the denominator:

(-u +6)/(u+2) = -u/(u+2) +6/(u+2)

__

4) You can also multiply numerator and denominator by some constant, say 3:

  -(3u -18)/(3u +6)

You could do the same thing with a variable, as long as you restrict the variable to be non-zero. Or, you could use a non-zero expression, such as 1+x^2:

  (1+x^2)(6 -u)/((1+x^2)(u+2))

7 0
3 years ago
Other questions:
  • A worker has four different job offers, each with a contract for seven years. Assuming the job descriptions are identical, which
    15·2 answers
  • Emma buys packets of coloured beads.
    5·1 answer
  • OFFERING 10 POINTS
    11·1 answer
  • What is the answer I need help it's math
    9·2 answers
  • 20% out of 70 plants
    8·2 answers
  • What is the additive inverse of 1?​
    13·2 answers
  • You read the first 20 pages of a book in 25 minutes. You read 36 pages in 45 minutes. Is the number of pages read
    6·2 answers
  • 24 is 17% of what number
    14·1 answer
  • In an isosceles triangle, the length of the base is half of the length of a leg. The perimeter of this triangle is 50cm. Find th
    5·2 answers
  • A cleaning solution uses 5 cups of soap for every 2 cups of vinegar. If Emery put 4 cups of soap in a container, how
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!