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gulaghasi [49]
3 years ago
7

Tell whether the sequence is arithmetic. If it is identify the common difference 1/2, 1/3,1/4

Mathematics
1 answer:
Oduvanchick [21]3 years ago
8 0

For this case we have the following definition:

An arithmetic sequence is a sequence of numbers that increases or decreases by a constant amount each term.

Thus, to obtain\frac{1}{3} it is necessary to subtract \frac{1}{2} from the amount of \frac{1}{6}.

To obtain \frac{1}{4} it is necessary to subtract \frac{1}{3} the amount of \frac{1}{12}.

As it is observed, a constant quantity is not diminished since \frac{1}{6} is not equal \frac{1}{12}.

So, the sequence is not arithmetic

Answer:

The sequence is not arithmetic


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2. Solve for x. SHOW YOUR WORK.
garik1379 [7]

Answer:

x=9

Step-by-step explanation:

The two labelled angles are equal, so we can construct an equation. Then, we solve the equation for x.

4x+2=7x-25\\2=3x-25\\3x=27\\x=9

First, we subtract 4x from both sides. Next, we add 25 to both sides. Finally, we divide both sides by 3.

8 0
3 years ago
The overhead reach distances of adult females are normally distributed with a mean of 205 cm and a standard deviation of 8.3 cm.
Gre4nikov [31]

a. Find the probability that an individual distance is greater than 214.30 cm

We find for the value of z score using the formula:

z = (x – u) / s

z = (214.30 – 205) / 8.3

z = 1.12

Since we are looking for x > 214.30 cm, we use the right tailed test to find for P at z = 1.12 from the tables:

P = 0.1314

 

b. Find the probability that the mean for 20 randomly selected distances is greater than 202.80 cm

We find for the value of z score using the formula:

z = (x – u) / s

z = (202.80 – 205) / 8.3

z = -0.265

Since we are looking for x > 202.80 cm, we use the right tailed test to find for P at z = -0.265 from the tables:

P = 0.6045

 

c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30?

I believe this is because we are given the population standard deviation sigma rather than the sample standard deviation. So we can use the z test.

7 0
3 years ago
Which of the followeing represents the solution...<br><br> 4(9+3z)≤12+6z
julia-pushkina [17]

Solving the inequality 4(9+3z)\leq 12+6z we get z\leq -4

Step-by-step explanation:

We need to solve the inequality 4(9+3z)\leq 12+6z

Solving:

4(9+3z)\leq 12+6z

Multiplying 4 with terms inside the bracket.

36+12z\leq 12+6z

Adding -36 on both sides:

12z\leq 12+6z-36

Adding -6z on both sides

12z-6z\leq 12-36

6z\leq -24

Divide both sides by 6

z\leq -4

So, solving the inequality 4(9+3z)\leq 12+6z we get z\leq -4

Keywords: Solving inequalities

Learn more about Solving inequalities at:

  • brainly.com/question/1465430
  • brainly.com/question/6703816
  • brainly.com/question/11788572
  • brainly.com/question/4192226

#learnwithBrainly

8 0
4 years ago
At what rate did Bonnie type her paper if she typed a 2 page report in 45 minutes?
daser333 [38]

Answer:

1 page takes her 22.5 minutes for each page

Step-by-step explanation:

8 0
3 years ago
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Is (-1, 2) a solution?
Anni [7]

Answer:

It can be an answer to many things.

Step-by-step explanation:

There needs to be some sort of picture or other item to explain what is going on.

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