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
butalik [34]
3 years ago
5

Find the value of x

Mathematics
1 answer:
Hitman42 [59]3 years ago
6 0

Answer:

10 i think

Step-by-step explanation:

You might be interested in
Here is a simple probability model for multiple-choice tests. Suppose that each student has probability p of correctly answering
Alla [95]

Answer:

a) The probability that Jodi scores 78% or lower on a 100-question test is 4%.

b) The probability that Jodi scores 78% or lower on a 250-question test is 0.023%.

Step-by-step explanation:

a) To approximate this distribution we have to calculate the mean and the standard distribution.

The mean is the proportion p=0.85.

The standard deviation can be calculates as:

\sigma=\sqrt{\frac{p(1-p)}{n} }= \sqrt{\frac{0.85*(1-0.85)}{100} }=0.04

To calculate the probability that Jodi scores 78% or less on a 100-question test, we first calculate the z-value:

z=\frac{p-p_0}{\sigma} =\frac{0.78-0.85}{0.04} =-1.75

The probability for this value of z is

P(x

The probability that Jodi scores 78% or lower on a 100-question test is 4%.

b) In this case, the number of questions is 250, so the standard deviation needs to be calculated again:

\sigma=\sqrt{\frac{p(1-p)}{n} }= \sqrt{\frac{0.85*(1-0.85)}{250} }=0.02

To calculate the probability that Jodi scores 78% or less on a 250-question test, we first calculate the z-value:

z=\frac{p-p_0}{\sigma} =\frac{0.78-0.85}{0.02} =-3.5

The probability for this value of z is

P(x

The probability that Jodi scores 78% or lower on a 250-question test is 0.023%.

6 0
2 years ago
There are 20 players in a table tennis competition. each player must play exactly one match against every other player. how many
Flauer [41]
There are 10 matches in the competition if you count every other player you'll end up with 10

7 0
3 years ago
5t 8=43 whats t.I WILL GIVE 50 POINTS AND IF YOU DONT RECEIVE THE POINTS TELL ME AND I WILL GIVE THEM.PLZ HELP MEEEEEEEEEEEEEEEE
lawyer [7]

==> I can't be sure of the equation.  There's a blank space
        between '5t' and '8', where an operation must be.
       I think the operation is more likely ' + ' (addition).  Brainly usually
       does show the ' - ' if it's subtraction, but goes blank if it's addition.
       Tell you what I'll do:  Since you sound so desperate, and you're being
       so generous with your points,  I'll show you how to figure it out both ways.

----------------------------------------

If it's subtraction:                 5t - 8 = 43

Add  8  to each side:              5t      = 51

Divide each side by  5 :            t     = 51/5

                                                 t     = 10 and 1/5

--------------------------------------------

If it's addition:                         5t + 8  =  43

Subtract  8  from each side:     5t        =  35

Divide each side by  5 :             t        =   7 

5 0
3 years ago
Read 2 more answers
Help show work step,<br> By step how to get the awnser
Archy [21]

Step-by-step explanation:

8 \frac{1}{3}  - 5 \frac{1}{2}  =  \frac{25}{3}  -  \frac{11}{2}  =  \frac{50}{6}  -  \frac{33}{6}  =  \frac{17}{6}  = 2 \frac{5}{6}

3 0
2 years ago
Write 4.5kg : 1500g as a ratio in its simplest form
Pachacha [2.7K]

Answer:

(4.5kg : 1500g) ÷ 4.5

=(4.5kg : 1.5kg) ÷ 4.5

=1kg : 0.33kg

6 0
2 years ago
Read 2 more answers
Other questions:
  • 2. A circular clock face has a diameter of 31 cm. What is the area of the
    15·1 answer
  • Circle 1: center (8, 5) and radius 6
    5·1 answer
  • I need help remembering the steps for 2x+5y=-7
    11·1 answer
  • A motorboat heads upstream a distance of 24 miles on a river whose current is running at 3 miles per hour. The trip up and back
    7·2 answers
  • Solve for x. <br><br> 30=5(x+1)
    5·2 answers
  • Solve for x.<br><br> x/3 ≤ −6<br><br><br><br> x≤−18<br> x≤−2<br> x≥−18<br> x≥−2
    9·2 answers
  • ( 70 POINTS BRAINLIST) an offshore windmill is partly submerged in the ocean. it's tallest point is 120 meters above sea level i
    12·2 answers
  • In ΔVWX, x = 5.3 inches, w = 7.3 inches and ∠W=37°. Find all possible values of ∠X, to the nearest 10th of a degree.
    15·2 answers
  • Please help!!
    7·1 answer
  • 5. Company “A” charges $80 a month for
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!