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
Serjik [45]
3 years ago
11

Please help on one math question

Mathematics
2 answers:
Andreyy893 years ago
8 0

Answer:

the answer is 225 :)))))))))))))))))))

Step-by-step explanation:

kipiarov [429]3 years ago
6 0

Hello from MrBillDoesMath!

Answer:

225

Discussion:

Sum ( 2n - 1)                  from  n = 1 to 15              

= Sum(2n) - Sum(1)        from n = 1 to 15

= 2 Sum(n) - Sum(1)       from n = 1 to 15

= 2* 15(15+1)/2  - (1 + 1 + .. + 1)

The first value comes from the fact that the sum of the first n integers is  n(n+1)/2. The latter value sums 15 1's.

= 2 * 15 * 16/2 - 15                    => 2/2 = 1

= 15*16 - 15                               => 15*16 = 240

= 240 - 15

= 225

Thank you,

MrB

You might be interested in
Please answer ASAP!!! :)<br> .-. .-. .-. .-. .-. .-.
SSSSS [86.1K]

Answer:

I highly recommend that it must be the second story

5 0
2 years ago
If 8 pounds of bananas cost $3.68, what is the cost per<br> pound?
12345 [234]

Answer:0.46

Step-by-step explanation

3.68 divided by 8 = 0.46

3 0
2 years ago
Read 2 more answers
Simplify 3(2x - 5).<br> -6x - 15<br> 6x - 15<br> 6x - 8<br> 5x - 2
Alekssandra [29.7K]
You just times it. (if you have a more question pm me). thank you

5 0
3 years ago
Read 2 more answers
If y is directly proportional to x squared <br> and y = 3 when x = 2, what is y when x = 8?
Anestetic [448]

Answer:

<u><em>y = 63</em></u>

Step-by-step explanation:

<em>y is directly proportional to x²</em>

<em>As given,</em>

<em>when y = 3 => x = 2</em>

<em>So, 3 = 4 - 1</em>

<em>Which means the relation can be written as :-</em>

<em>y = x² - 1</em>

<em></em>

<em>Substituting x = 8</em>

<em>y = (8)² - 1</em>

<em>y = 64 - 1</em>

<u><em>y = 63</em></u>

5 0
2 years ago
Read 2 more answers
a local hamburger shop sold a combined total of 628 hamburgers and cheeseburgers on Wednesday. There were 72 fewer cheeseburger
defon
There were 386 hamburger sold
7 0
3 years ago
Other questions:
  • A college administrator knows that 70% of the students at her college are from out of state, so she decides to make sure that sh
    7·1 answer
  • I need to do this tonight, help plz
    13·1 answer
  • In 1898 L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that
    10·1 answer
  • What is the length of the altitude of the equilateral triangle below
    12·2 answers
  • Please Help
    14·1 answer
  • Tony started his math project at 1{:}57\text { p.m.}1:57 p.m.1, colon, 57, space, p, point, m, point and finished the project 80
    5·2 answers
  • Carly can paint 6/7 of a picture in 3/14 of an hour how many pictures can they paint in a full hour
    11·2 answers
  • Determine if f (x) = -x^3 + 4x^2 +7x - 6 is a odd or even degree
    6·2 answers
  • Ms. Potts washed 1/4 of her laundry. Her son washed 3/7 of it. Who washed most of the laundry? How much of the laundry still nee
    6·2 answers
  • What is the circumference?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!