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
KIM [24]
3 years ago
6

What is the explicit rule for the sequence?

Mathematics
2 answers:
nirvana33 [79]3 years ago
8 0
ANSWER

The explicit rule for the sequence is

a_n=18+2.5n


EXPLANATION

The terms of the sequence are
15.5,13,10.5,8,5.5,3,...


The first term of the sequence is
a = 15.5
and the constant difference is
d =13 -  15.5 =  - 2.5
Since there is a constant difference, it means the sequence is an arithmetic progression.



The general formula for an arithmetic sequence is given by the formula,


a_n=a+(n-1)d





We substitute the above values to obtain,



a_n=15.5 - 2.5(n-1)



We expand to obtain,


a_n=15.5 - 2.5n + 2.5


This will simplify to,

a_n=18+2.5n


Therefore the correct answer is A.
scZoUnD [109]3 years ago
5 0
Hello, sorry this is a little late!

I believe the correct answer to your question would best be Option A.

I can confirm this is 100% correct!

Hope this helps and have a great rest of your day :)
You might be interested in
Next, you will make a scatterplot. Name a point that will be on your scatterplot and describe what it represents.
klio [65]

The point (12, 190) means that the temperature after 12 hours is 190 degrees Celsius

<h3>How to make a scatter plot?</h3>

To do this, we make use of the following points

(12, 190), (14, 201), (15, 301), (16, 305), (18, 350), (20, 40), (25, 450)

Where x represents the number of hours and y represents temperature

See attachment for the scatter plot.

<h3>The description of a point</h3>

To do this, we make use of the point (12, 190)

This means that the temperature after 12 hours is 190 degrees Celsius

Read more about scatter plots at:

brainly.com/question/13984412

#SPJ1

8 0
2 years ago
Write the equation of a line that is parallel to the line 2x - 3y = 5 and passes through the point (2, -1)
jek_recluse [69]

Answer:

The equation of the line is 2x - 3y = 7 ⇒ answer A

Step-by-step explanation:

* Lets revise the relation between the parallel lines

- If two lines are equal then their slopes are equal

- We can make an equation of a line by using its slope and

 a point on the line

- If the slope of the line is m and passing through the point (x1 , y1),

 then we can use this form [y - y1]/[x - x1] = m to find the equation

* Lets solve the problem

- The line is parallel to the line 2x - 3y = 5

∴ the slope of the line = the slope of the line 2x - 3y = 5

- Rearrange the terms of the equation to be in the form

  y = mx + c to find the slope of it

∵ 2x - 3y = 5 ⇒ subtract 2x from both sides

∴ -3y = 5 - 2x ⇒ divide two sides by -3

∴ y = 5/-3 - 2x/-3 ⇒ y = 2/3 x - 5/3

∴ The slop of the line is 2/3

∵ The line passes through point (2 , -1)

* Lets use the rule to find the equation of the line

∵ y - (-1)/x - 2 = 2/3

∴ y + 1/x - 2 = 2/3 ⇒ by using cross multiplication

∴ 3(y + 1) = 2(x - 2) ⇒ open the brackets

∴ 3y + 3 = 2x - 4 ⇒ put x an d y in one side

∴ 2x - 3y = 3 + 4

∴ 2x - 3y = 7

* The equation of the line is 2x - 3y = 7

8 0
3 years ago
I need these all written out on how they're done along with the answer please
taurus [48]
Well, these are quite simple really, especially 1,2,3 and 4. If you read the questions carefully, you can understand it well. You don’t need to know the answer, you just need to understand
8 0
3 years ago
You are at the music store to buy some CDs. You have $45 to spend and the store sells CDs for $12.99 each.
stealth61 [152]
$45>(or equal to)$12.99n   you can spend less then or equal to forty five dollars without going into debt.
8 0
3 years ago
What information is needed to prove the triangles are congruent using the Hypotenuse-Leg theorem
Katarina [22]
The answer is 45 ok for real
5 0
2 years ago
Other questions:
  • The amount of time t it takes for a group of volunteers to clean up a park varies inversely with the number of volunteers v. If
    9·2 answers
  • There are 25 students in Ms.Morris's class. She wants to divide the class into 3,4,or 5 equal teams with all students on a team.
    6·2 answers
  • 3x+7=13 (x=-2;x=2;x=5)
    12·2 answers
  • 8-4d=12 what is d equal to ?
    6·1 answer
  • A cylinder has a volume of 486 pi ft^3. if the height is 6ft what is the diameter
    8·1 answer
  • Please help me! I will mark brainliest!
    6·2 answers
  • Write an equation of the line with a slope of - 3 and y -intercept
    5·1 answer
  • A rectangular swimming pool is surrounded by a deck as shown. The area (in square feet) of the pool is represented by x^2-10x+16
    15·1 answer
  • What is the Gcf of 10 and 6?
    7·1 answer
  • PLEASE HELP ME GIVING 30 POINTS!!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!