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
siniylev [52]
2 years ago
8

Brian was thinking of a number. Brian halves the number and gets an answer of 67.8. Form an equation with x from the information

.
Mathematics
1 answer:
Fofino [41]2 years ago
7 0

Answer:

x ÷ 2 = 67.8

You might be interested in
Cushing's disease is characterized by muscular weakness due to adrenal or pituitary dysfunction. To provide effective treatment,
Katyanochek1 [597]

Answer:

Since the calculated value of t =-0.427 does not  fall in the critical region so we accept H0 and conclude that there is enough evidence to show that mean difference in the  age of onset of symptoms and age of diagnosis is  25 months  .

Step-by-step explanation:

The given data is

Difference d= -24 -12 -55 -15 -30 -60 -14 -21 -48 -12 -25 -53 -61 -69 -80

∑ d= -579

 ∑d²= 29871

1) Let the hypotheses be

H0: ud= 25 against the claim    Ha: ud ≠25

H0 : mean difference in the  age of onset of symptoms and age of diagnosis is  25 months  .

Ha:   mean difference in the  age of onset of symptoms and age of diagnosis is not 25 months.

 

2) The degrees of freedom = n-1= 15-1= 14

3) The significance level is 0.05

4) The test statistic is

t= d`/sd/√n

The critical region is ║t║≤ t (0.025,14) = ±2.145

d`= ∑di/n= -579/15= -38.6

Sd= 23.178  (using calculators)

Therefore

t= d`/ sd/√n

t= -38.6/ 23.178√15

t= -1.655/3.872= -0.427

5) Since the calculated value of t =-0.427 does not  fall in the critical region so we accept H0 and conclude that there is enough evidence to show that mean difference in the  age of onset of symptoms and age of diagnosis is  25 months  .

8 0
3 years ago
Use the graph below to answer the question that follows:
Strike441 [17]
By graphing the given points, we will get the attached figure
which represents:
                                          f(x) = 3 sin x
but sin x = cos (x - π/2)
                                     ∴  f(x) = 3 cos ( x - π/2 )

The correct choice is option ⇒⇒⇒ <span>f(x) = 3 cos(x − pi over 2 ) </span>

3 0
2 years ago
Help me please I need
vagabundo [1.1K]

Answer:

I think the answer is A=49

8 0
3 years ago
A group of friends count the coins they have in their pockets.
Len [333]

Answer:

The median stays the same, whilst the mean drops.

Step-by-step explanation:

4 0
2 years ago
To fit between two Windows the width of a bookshelf must be no greater than 6 1/2 feet. Mrs. Aguilar purchases a bookshelf that
Ann [662]
To convert the measurement in feet to inches, multiply it by 12. 6 1/2 feet is equal to 78 inches. The bookshelf bought by Mrs. Aguilar has a width that is 1 inch lesser than the distance between windows. This suggests that the bookshelf will fit in the allotted space. 
4 0
3 years ago
Other questions:
  • Translate the phrase into an algebraic expression.<br> The product of b<br> and 4
    8·1 answer
  • Of 60 books on a bookself, 24 are nonfiction what percent of the books are not nonfiction?
    15·1 answer
  • Determine whether each statement is true or false.
    7·1 answer
  • The difference between the product of three and a number and two times the number
    10·1 answer
  • Jose draws AABC. AB has a length of 10 inches and BC has a length of 15 inches. Determine whether each measurement could be the
    11·1 answer
  • 0.8 k - 20 = -60<br><br> what does ‘k’ equal?
    8·2 answers
  • Please help :p - will give brainliest if correct
    8·1 answer
  • Learning Task 3. Fill in the largest unit digit to make them se by the numbers on the left. 1.) Divisible by 4 (125) 2.) Divisib
    11·1 answer
  • Two trains leave towns 1490 kilometers apart at the same time and travel toward each other. One train travels 20 km/h slower tha
    11·1 answer
  • 2. Patrick worked 5.25 hours on Monday,
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!