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
svetlana [45]
2 years ago
9

Solve for N: 3n - 7 = 6n - 2n

Mathematics
1 answer:
jonny [76]2 years ago
3 0

Answer:

-7

Step-by-step explanation:

1. Combine Like Terms

3n-7=4n

2. Subtract 3n on both sides.

-7=n

3. You got your answer:)

You might be interested in
The width of a rectangle is 21 meters. The area is 609 square meters. What is the length?
VLD [36.1K]

Step-by-step explanation:

Remember Area = length X Width

7 0
3 years ago
An article describes a study comparing two methods of measuring mean arterial blood pressure. The auscultatory method is based o
zzz [600]

Answer:

p_v =P(t_{(5)}>0.499) =0.319

The p value is higher than any significance level given for example \alpha=0.05,0.1, so then we can conclude that we FAIL to reject the null hypothesis. So we don't have enough evidence to conclude that the mean reading is greater for the auscultatory method at 5% or 10% of significance.

Step-by-step explanation:

A paired t-test is used to compare two population means where you have two samples in  which observations in one sample can be paired with observations in the other sample. For example  if we have Before-and-after observations we can use it.  

Let put some notation  

x=Auscultatory method , y = Oscillatory method

x: 74 86 84 79 70 78 79 70

y: 70 85 90 110 71 80 69 74

The system of hypothesis for this case are:

Null hypothesis: \mu_x- \mu_y \leq 0

Alternative hypothesis: \mu_x -\mu_y >0

The first step is define the difference d_i=x_i-y_i, that is given so we have:

d: 6.6, 4.2, -5.5, -3.1, 9.3, -3.9

The second step is calculate the mean difference  

\bar d= \frac{\sum_{i=1}^n d_i}{n}=1.267

The third step would be calculate the standard deviation for the differences, and we got:

s_d =\sqrt{\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1}} =6.215

The fourth step is calculate the statistic given by :

t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{1.267 -0}{\frac{6.215}{\sqrt{6}}}=0.499

The next step is calculate the degrees of freedom given by:

df=n-1=6-1=5

Now we can calculate the p value, since we have a right tailed test the p value is given by:

p_v =P(t_{(5)}>0.499) =0.319

The p value is higher than any significance level given for example \alpha=0.05,0.1, so then we can conclude that we FAIL to reject the null hypothesis. So we don't have enough evidence to conclude that the mean reading is greater for the auscultatory method at 5% or 10% of significance.

5 0
2 years ago
Duncan earned $22 in interest. If his investment paid 2.5% and he invested his money for 6 months, how much money did he origina
anyanavicka [17]

Answer:

For one month:22*.025=.55

For 6 moths: 6*.55 =3.3

The answer is 3.3 $

6 0
2 years ago
Helpp!!!!<br> Give the relation and identify the x and y axis intercepts.
densk [106]

Answer:

(2, 0) and (6, 0)

Step-by-step explanation:

y = x^2 - 8 x + 12

To get the x intersept put y = 0

x^2 - 8 x + 12 = 0 \\\\x^2 - 6 x - 2 x + 12 = 0 \\\\x(x- 6) - 2(x - 6) = 0 \\\\(x - 2) (x - 6) = 0 \\\\x = 2 and x = 6

So, the intersepts are

(2, 0) and (6, 0)

8 0
3 years ago
Given that ∠ABC is bisected by BD→, m∠ABD = (-159 – 12x)°, and m∠DBC = (3x + 96)°, find x and m∠ABC.
laiz [17]
When anything is bisected, the two halves are equal. This means
(-159 - 12x) = (3x + 96)
-255 = 15x . . . . . . . . . . . . . add 12x-96
-17 = x

Then either of the smaller angles is
(3(-17) + 96)° = 45°

angle ABC is twice this value, or 90°.
7 0
3 years ago
Other questions:
  • the ratio of boys to girl in Mr. Claytons class is 2:3. If there are 30 total students how many more girls are in the class than
    7·2 answers
  • What is the domain of the following relation?<br> {(a, b), (b, c), (c, a), (a, c), (c, d)}
    15·2 answers
  • Draw a dot plot for the set of data.<br><br> 2, 5, 0, 1, 3, 2, 0, 2, 4, 3, 1, 3, 4, 2, 0
    7·2 answers
  • At what values of x does the graph of f(x)= sin x intersect the x-axis?
    9·2 answers
  • Give the degree of each polynomial
    8·2 answers
  • Andres found out that his experimental probability of getting a hit is 40%. Out of 350 at bats, about how many hits could he pre
    13·1 answer
  • 1 ÷ 3 Express your answer as a fraction
    14·2 answers
  • Help me please , Write the slope intercept of the given line, provide the submit solution
    11·1 answer
  • Estimate the quotient for 627 ÷ 9. explain how you found your awnser
    8·2 answers
  • Show all work to write the expression in simplified radical form:
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!