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
Stels [109]
3 years ago
6

I know it’s not 5 please help.

Mathematics
1 answer:
antoniya [11.8K]3 years ago
7 0
It’s 2 because you plug in “x+1” as y into the the first equation then solve for x.
You might be interested in
Polly's Polls asked 1850 second-year college students if they still had their original major. According to the colleges, 65% of
suter [353]

Answer:

The probability that Polly's Sample will give a result within 1% of the value 65% is 0.6424

Step-by-step explanation:

The variable that assigns the value 1 if a person had its original major and 0 otherwise is a Bernoulli variable with paramenter 0.65. Since she asked the question to 1850 people, then the number of students that will have their original major is a Binomial random variable with parameters n = 1850, p = 0.65.

Since the sample is large enough, we can use the Central Limit Theorem to approximate that random variable to a Normal random variable, which we will denote X.

The parameters of X are determined with the mean and standard deviation of the Binomal that we are approximating. The mean is np = 1850*0.65 = 1202.5, and the standard deviation is √np(1-p) = √(1202.5*0.35) = 20.5152.

We want to know the probability that X is between 0.64*1850 = 1184 and 0.66*1850 = 1221 (that is, the percentage is between 64 and 66). In order to calculate this, we standarize X so that we can work with a standard normal random variable W ≈ N(0,1). The standarization is obtained by substracting the mean from X and dividing the result by the standard deviation, in other words

W = \frac{X-\lambda}{\sigma} = \frac{X-1202.5}{20.5152}

The values of the cummulative function of the standard normal variable W, which we will denote \phi are tabulated and they can be found in the attached file.

Now, we are ready to compute the probability that X is between 1184 and 1221. Remember that, since the standard random variable is symmetric through 0, then \phi(-z) = 1-\phi(z) for each positive value z.

P(1184 < X < 1221) = P(\frac{1184-1202.5}{20.5152} < \frac{X-1202.5}{20.5152} < \frac{1221-1202.5}{20.5152})\\ = P(-0.9018 < W < 0.9018) = \phi(0.9018) - \phi(-0.9018) = \phi(0.9018)-(1-\phi(0.9018))\\ = 2\phi(0.9018)-1 = 2*0.8212-1 = 0.6424

Therefore, the probability that Polly's Sample will give a result within 1% of the value 65% is 0.6424.

Download pdf
4 0
3 years ago
Problem number eight
wariber [46]

Hello there! The answer is C. 7/9.

The question is asking you how to find the absolute value of -7/9. Absolute value is the value of the number, regardless if it is negative or positive. So, that makes C your answer.

I hope this was helpful in finding an answer to your question, have a great day! :)

7 0
3 years ago
Read 2 more answers
How to solve 832 divide 32 multiply by 5 =
mixas84 [53]
The answer is 130 ...
4 0
3 years ago
Read 2 more answers
In spherical geometry, all points are points on the surface of a sphere. A line is a circle on the sphere whose diameter is equa
mamaluj [8]

Answer: It is not possible that two triangles that are similar and not congruent in spherical geometry.

Step-by-step explanation:

For instance, taking a circle on the sphere whose diameter is equal to the diameter of the sphere and inside is an equilateral triangle, because the sphere is perfect, if we draw a circle (longitudinal or latitudinal lines) to form a circle encompassing an equally shaped triangle at different points of the sphere will definately yield equal size.

in other words, triangles formed in a sphere must be congruent and also similar meaning having the same shape and must definately have the same size.

Therefore, it is not possible for two triangles in a sphere that are similar but not congruent.

Two triangles in sphere that are similar must be congruent.

8 0
3 years ago
Pleasee anyonnee help me assaaapppp
nekit [7.7K]
30, 34
You add 4 on
44
Because it starts at 10 and 10 cannot be divided by 4
7 0
2 years ago
Other questions:
  • How many angles are there
    9·2 answers
  • Simplify to create an equivalent expression.
    8·1 answer
  • Would be highly appreciated if u can show work that would be great :)
    12·1 answer
  • The table below shows the number of restaurants advertisement in a city directory.
    11·1 answer
  • Write the equation of the line shown in the graph. Please help.
    6·2 answers
  • What is power rule and definitions
    7·1 answer
  • A punch recipe requires 4 cups of crandberry juice to make 5 gallons of punch. Using the same recipe, what is the amount of cran
    8·1 answer
  • Help pls hw 14 and 15 mostly those the rest I’ll do
    11·2 answers
  • Simplify The Expression <br><br> 2y - y + 4 + y<br> y=3​
    5·1 answer
  • If 6n+6=36 what does 25n equal
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!