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
yanalaym [24]
3 years ago
11

What is the sum of the series 18 E n=4 (n+1) ^2? 1,239 2,415 2,440 2,469

Mathematics
2 answers:
Akimi4 [234]3 years ago
8 0

Answer:

<h2>C. <em><u>2</u></em><em><u>4</u></em><em><u>4</u></em><em><u>0</u></em></h2>

Step-by-step explanation:

hope it helps u too

Leto [7]3 years ago
5 0

9514 1404 393

Answer:

  (c)  2440

Step-by-step explanation:

The sum of the squares of numbers 1 .. n is ...

  s(n) = n(n +1)(2n +1)/6

You want the sum of squares from 5 to 19. We can compute that from ...

  s(19) -s(4) = (19(20)(39) -4(5)(9))/6 = (14820 -180)/6 = 2440

You might be interested in
Present Value Hoew much shuold be deposited in an account paying 7.8% interest compounded monthly in order to have a balance of
Alisiya [41]

Answer: $15385 should be deposited.

Step-by-step explanation:

The principal was compounded monthly. This means that it was compounded 12 times in a year. So

n = 12

The rate at which the principal was compounded is 7.8%. So

r = 7.8/100 = 0.078

It was compounded for 4 years. Therefore,

t = 4

The formula for compound interest is

A = P(1+r/n)^nt

A = total amount in the account at the end of t years. The total amount is given as $21000. Therefore

21000 = P (1+0.078/12)^12×4

21000 = P (1+0.078/12)^48

21000 = P (1+0.0065)^48

21000 = P (1.0065)^48

P = 21000/1.365

P = $15385

6 0
3 years ago
Order from least to greatest 0.5, 1/5, 0.35, 12/25, 4/5
sdas [7]
First change them all into either fractions or decimals. Decimals are probably easier though. 1/5 = 0.2; 12/25 = 0.48; 4/5 = 0.8 
Order: 0.2, 0.35, 0.48, 0.5, 0.8
Then you change the decimals that you converted back into the fraction form
Answer: 1/5, 0.35, 12/25, 0.5, 4/5
5 0
3 years ago
Find the slope and y-intercept for this table.​
labwork [276]

Answer:

See below:

Step-by-step explanation:

To find the slope, we use the following formula:

\frac{y_{2} - y_{1} }{x_{2} - x_{1} }

For this case, we can use (6,60) as the first set of points.

We can use (4,70) as the second set of points.

Now, we can use the formula, 70-60 is for the top of the fraction (10)

We can do 4-6 to find the bottom, which is (-2)

Now, if we add the fraction back we get -> 10/-2 which is -5 for slope!

To find out the y intercept, it in simple words is "What is y when x is 0?".

We can do that by using the slope intercept formula: y=mx+b.

Once we insert our slope which is -2 we get: y=-2x+b

We can now substitute a point, lets use (6,60) so we can find out b.

We now get the equation: 60=-5(6)+b.

If we solve for that we get 90!

Once we input that, we get, y=-5x+90

Now we put in x as 0 and we get our y intercept as 90!

If this answer helped, consider marking as brainliest!!

8 0
3 years ago
Need helppp asap plsss i added a pic ​
svetlana [45]
16/2
According to PEMDAS

Multiplying/dividing comes first when you read the equation from left to right
5 0
3 years ago
Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominator. 56 : 48
dangina [55]

Answer:

7/6

Step-by-step explanation:

divide both the numerator and denominator by 8

3 0
3 years ago
Other questions:
  • HELP PLS! WILL MARK BRAINLIEST!!!!! 50 POINTS!!!!
    7·1 answer
  • Lynn asked six friends how many cars their parents own. She recorded 1, 1, 2, 2, 2, and 4 cars.
    14·2 answers
  • Can someone help me with 39 and 40?
    11·2 answers
  • Owen used these steps to solve the equation 4x+7=1+2(2x+3). Which choice describes the meaning of his result, 7=7?
    8·1 answer
  • I really don't understand i need help asap. They were asking to find f(-8)
    11·1 answer
  • Jessie wants to find out what type of music her fellow students enjoy the most. She asks her classmates: "What is your favorite
    9·1 answer
  • Which expression is equivalent to 20c – 8d?
    15·1 answer
  • ANSWER CORRECT FOR BRAINLIEST
    10·2 answers
  • When f(x) = –3, what is x?<br><br> –29<br> –10<br> –3<br> –1
    15·1 answer
  • 3. The stairs must be wide enough for fans to come and go safely. But wider
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!