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
user100 [1]
3 years ago
15

Find the diffrence between -2 and 7 on the number line

Mathematics
1 answer:
lozanna [386]3 years ago
5 0

Answer:

9 units

Step-by-step explanation:

Calculate the absolute value of the difference, that is

| - 2 - 7 | = | - 9 | = 9 , or

| 7 - (- 2) | = | 9 | = 9

You might be interested in
Medicare would like to test the hypothesis that the average monthly rate for one-bedroom assisted-living facility is equal to $3
aliina [53]

Answer:

C) more than the absolute value of the critical value, we can conclude that the average monthly rate for an assisted-living facility is not equal to $3,300.

Step-by-step explanation:

Hello!

Interest hypothesizes is " the average monthly rate for one-bedroom assisted-living facility is equal to $3300" symbolically: μ = 3300

The study variable is:

X: Monthly rate for a one-bedroom assisted-living facility.

Since there is no information about the distribution of the variable, to be able to study the population mean, I'll assume that the variable has a normal distribution.

The hypothesis is:

H₀: μ = 3300

H₁: μ ≠ 3300

α: 0.05

The statistic to use, considering that there is no known population information and the sample size, is a Student t:

t= <u> X[bar] - μ </u> ~t_{n-1}

       S/√n

n= 12

X[bar]= $3690

S= $530

Using the sample data, calculate the statistic value:

t= <u> 3690 - 3300 </u> = 2.549

       530/√12

The rejection region for this test is two-tailed, with critical values:

t_{n-1; \alpha /2} = t_{11; 0.025} = -2.201

t_{n-1;1-\alpha /2} = t_{11; 0.975} = 2.201

The decision rule is:

Reject the null hypothesis if t ≤ -2.201 or if t ≥ 2.201

Not reject the null hypothesis if -2.201 < t < 2.201

Since the calculated value (2.549) is greater than the right critical value (2.201) the decision is to reject the null hypothesis.

With a signification level of 5%, there is enough evidence to reject the null hypothesis. This means that the population mean of the monthly rate for a one-bedroom assisted living facility is different from $3300.

I hope it helps!

7 0
2 years ago
. Solve for the given variable.<br> a. 4y + 3 = 19<br><br><br><br> b. 12n - 3 = 5
Kamila [148]

Answer:

(a) 4

(b) 2/3

Step-by-step explanation:

(a) 4y+3=19

4y=19-3

4y=16

y=4

(b) 12n-3=5

12n=5+3

12n=8

n=8/12

n=2/3

4 0
3 years ago
Read 2 more answers
What are the equations of the asymptotes of the graph of the function f(x)=3x^2-2x-1/x^2+3x-10
kotykmax [81]
Ik one for sure is a horizontal asmym which is   3 
7 0
3 years ago
Question DEF will be reflected across a line such that all of vertices of triangle D’E’F are in quadrant II. What line of reflec
natali 33 [55]

Answer:

i think the answer is b by far

5 0
3 years ago
Read 2 more answers
Are these triangles similar?
OLga [1]

Answer:

no

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which is the correct formula to find the area of ABC?
    8·2 answers
  • Please help !!!! I want to pass
    13·1 answer
  • What<br> Are the answers please tell me
    11·1 answer
  • Which graph represents a linear function? A coordinate plane is shown with a way line beginning along the x axis and continuing
    10·2 answers
  • Derivative of 2 tan^3(x)+5 csc^4(x) ?
    10·1 answer
  • How do you solve this
    11·1 answer
  • 8y - 1-/2 ( 4y - 16)
    13·1 answer
  • 144 like exponent and with 12 like base
    8·1 answer
  • A rectangular painting has an area of 420 square inches. If the length is (2x + 5) inches and the width is (x) inches, then what
    14·1 answer
  • 3. In a sample of 250 high school seniors,
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!