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
Leokris [45]
3 years ago
15

Identify the like term 9x, 10y, -9y, 10

Mathematics
1 answer:
quester [9]3 years ago
7 0

the like terms are: 10y, and -9y because they are both of the same variable, y.

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
Simplify - (x + 2) +-3
bekas [8.4K]
Answer : -x-5
———————
7 0
2 years ago
Read 2 more answers
Please help asap will mark brainliest
steposvetlana [31]
The answer is -6x^2 + 7x, or answer choice A.
6 0
3 years ago
Read 2 more answers
Craig earns the same amount of money each month. His telephone bill is 1/20 of his monthly earnings, and he pays a total of $720
Juliette [100K]
Answer: $1200
Explanation:
The amount of telephone bill Craig has to pay each month: $720/12= $60
His earnings each month: $60 x 20 = $1200
7 0
3 years ago
A rope is 12 meters long. You cut off 15/6 of the rope. How much is left?
Darina [25.2K]

Answer:

4.8

Step-by-step explanation:

15/6 is 2.5 whitch when divided by 12 is 4.8 so 12 divided by 2.5 is 4.8

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which equation has the steepest graph
    9·1 answer
  • HELP ASAP!!!! EXPLAIN
    5·2 answers
  • a scale model of a school building is 5 inches tall. If the building is 100 feet tall, find the scale of the model
    11·2 answers
  • Ronald buys pizza cut into 12 different parts. he then cuts each part into 2 equal peices. if he eats 3 of these peices, what fr
    7·1 answer
  • What is 91 divided by 3
    14·2 answers
  • What might be the units that you write in the blanks that make this true?
    9·1 answer
  • Round 1001 to the nearest thousand.
    14·1 answer
  • Difference between DIRECT and INDIRECT ratio?​
    10·2 answers
  • Please help with this thank youu
    9·2 answers
  • A circular running track is 1/2 mile long. Elena runs on this track, completing each lap in 1/10 of an
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!