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
meriva
3 years ago
5

Complete the recursive formula of the arithmetic sequence, 9, -1, -11, -21

Mathematics
1 answer:
nikdorinn [45]3 years ago
7 0

Answer:

d(1)= 9

d(n)= d(n-1)+ (-10)

You might be interested in
What percent of 60 is 15
Kazeer [188]
The answer is 25 percent
4 0
4 years ago
Read 2 more answers
Math question #1 please show steps
-Dominant- [34]

Answer:

C

Step-by-step explanation:

An approximation of an integral is given by:

\displaystyle \int_a^bf(x)\, dx\approx \sum_{k=1}^nf(x_k)\Delta x\text{ where } \Delta x=\frac{b-a}{n}

First, find Δx. Our a = 2 and b = 8:

\displaystyle \Delta x=\frac{8-2}{n}=\frac{6}{n}

The left endpoint is modeled with:

x_k=a+\Delta x(k-1)

And the right endpoint is modeled with:

x_k=a+\Delta xk

Since we are using a Left Riemann Sum, we will use the first equation.

Our function is:

f(x)=\cos(x^2)

Therefore:

f(x_k)=\cos((a+\Delta x(k-1))^2)

By substitution:

\displaystyle f(x_k)=\cos((2+\frac{6}{n}(k-1))^2)

Putting it all together:

\displaystyle \int_2^8\cos(x^2)\, dx\approx \sum_{k=1}^{n}\Big(\cos((2+\frac{6}{n}(k-1))^2)\Big)\frac{6}{n}

Thus, our answer is C.

*Note: Not sure why they placed the exponent outside the cosine. Perhaps it was a typo. But C will most likely be the correct answer regardless.

5 0
3 years ago
A freight train leaves a station traveling 60 miles per hour. 30 minutes later, a passenger train leaves the station in the same
Umnica [9.8K]
It will take 2 hours and 30 minutes
6 0
3 years ago
Micheal can eat 24 hot dogs in 6 minutes for a hot dog eating contest he wants to know how many minutes it would take him to eat
Ksju [112]

It would take him 11 minutes

He is currently eating 4 a minute because 24 divided by 6 is 4 and if you divide 44 by 4 you get eleven.

7 0
3 years ago
I need help for 2, 4,7 and 9 !! SOLVE FOR X !!! Thank you
Olenka [21]
2 is 145 4 is 18 7 is 30 and 9 is 162. just look at the opposites 
4 0
3 years ago
Other questions:
  • The length of a rectangle is 3 times the width. The perimeter is 44 cm. What are the dimensions of the rectangle? Write and solv
    12·1 answer
  • Whats x? Problem:2x+7=11-2x
    14·2 answers
  • Find the surface area of a cylinder with diameter of 10 and height of 4
    9·2 answers
  • You earn $9.50 per hour at your summer job. Write and solve an inequality to find the number of hours you need to work to buy a
    12·1 answer
  • Use rounding to estimate the difference of 18.14 - 9.88.<br><br> A. 6<br> B. 9<br> C. 7<br> D. 8
    11·2 answers
  • PLEASE HELP!!!!
    15·1 answer
  • HELP PLEASE REEEEEEEEEEEE!! Note: Enter your answer and show all the steps that you use to solve this problem in the space provi
    7·1 answer
  • Solve for x round to one decimal place.
    13·1 answer
  • The price of a 3-pack of Spinners is one third the price
    14·1 answer
  • PLSSS HLEPP ME OUTT ITS URGENTTTT​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!