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
Liula [17]
2 years ago
8

Given 3 + 7 + 11 + 15 + ... find S20

Mathematics
1 answer:
nasty-shy [4]2 years ago
6 0
=4n - 1
Since the sequence is add 4 and 3-4 = -1

20 x 4n = 80-1 = 79
You might be interested in
if the variance of the data values in a population is 256, what is the standard deviation of the data values?
kumpel [21]
The standard deviation is the square root of the variance

so if the variance is 256, then the standard deviation is : sqrt 256 = 16 <==
5 0
3 years ago
The following function represents the profit P(n), in dollars, that a concert promoter makes by selling tickets for n dollars ea
Gre4nikov [31]
A) zeroes

P(n) = -250 n^2 + 2500n - 5250

Extract common factor:

P(n)= -250 (n^2 - 10n + 21)

Factor (find two numbers that sum -10 and its product is 21)

P(n) = -250(n - 3)(n - 7)

Zeroes ==> n - 3 = 0  or n -7 = 0
Then n = 3 and n = 7 are the zeros.

They rerpesent that if the promoter sells tickets at 3  or 7 dollars the profit is zero.

B) Maximum profit

Completion of squares

n^2 - 10n + 21 = n^2 - 10n + 25 - 4 = (n^2 - 10n+ 25) - 4 = (n - 5)^2 - 4

P(n) = - 250[(n-5)^2 -4] = -250(n-5)^2 + 1000

Maximum ==> - 250 (n - 5)^2 = 0 ==> n = 5 and P(5) = 1000

Maximum profit =1000 at n = 5

C) Axis of symmetry

Vertex = (h,k) when the equation is in the form A(n-h)^2 + k

Comparing A(n-h)^2 + k with - 250(n - 5)^2 + 1000

Vertex = (5, 1000) and the symmetry axis is n = 5.



8 0
3 years ago
Can someone please help me to solve this? ASAP<br> Please with explanation, no spam
snow_lady [41]

Answer:

<h2>which question dear..maybe you forgot to add the attachment...</h2>
7 0
3 years ago
Help me.................
hodyreva [135]
I think it would be letter D
4 0
3 years ago
Read 2 more answers
A square floor has 100 tiles. Each tile is 1 square foot. What is the length of one side of this square floor. A = 10 feet B = 2
kirill115 [55]
Ugghhvgunbyh bcc hhnjunbf hddrgh cdddddtnnktbjk
5 0
2 years ago
Other questions:
  • IB/AP Mathematice: Logorithms
    6·1 answer
  • Can someone help me find the answer for M&gt;5
    15·2 answers
  • 1/x + 1/3x =6 how do you solve this equation for x
    6·1 answer
  • The area of a square game board is 144 sq.in.whats the lenght of the sides of the board
    11·1 answer
  • Find the total amount of water that will leak in the first 24 hours if the leak is not fixed. Use the formula sn=a1-rn1-r and ro
    5·1 answer
  • Ryan has 10 apples hames to 7 how many are left
    13·2 answers
  • What do the values of m and b represent in the equation y mx +b?
    5·1 answer
  • What is the solution to the system of equations
    10·1 answer
  • Need HELP! <br><br>OA:point U<br><br>OB:point V<br><br>OC:point W<br><br>OD: point X​
    9·1 answer
  • Round 3,854,927 to the hundredths place
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!