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
Papessa [141]
3 years ago
7

Find the sum of the following ap .1) 1/15, 1/12, 1/10,....,to 11 terms​

Mathematics
1 answer:
sertanlavr [38]3 years ago
8 0

Answer:

33/20

Step-by-step explanation:

1/12 - 1/15 = 5/60 - 4/60 = 1/60

d = 1/60

a_n = a_1 + d(n - 1)

a_11 = 1/15 + (1/60)(11 - 1)

a_11 = 1/15 + 1/6

a_11 = 4/60 + 10/60

a_11 = 14/60

a_11 = 7/30

a_12 = 14/60 + 1/60

a_12 = 15/60

a_12 = 1/4

s_n = n(a_1 + a_n)/2

s_11 = 11(1/15 + 7/30)/2

s_11 = 11(2/30 + 7/30)/2

s_11 = 11(9/30)/2

s_11 = 99/60

s_11 = 33/20

You might be interested in
HELP FAST PLS !!!!
fgiga [73]

Answer:

1 True

2 c>−4

3 x<  3/2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Two interior angles of a triangle each measure 34 what is the measure of the third interior angel?
Anestetic [448]
I go I go I go I go cra a a azy
6 0
3 years ago
The sum of three integers is 92. The second number is three times the first number. The third number is ten less than twice the
SVEN [57.7K]
Given,
The sum of three integers is 92

So,
Let,
The first integer be "x"
The second integer be "y"
The third integer be "z"

Now,
According to the question,
y = 3x          ..............equation (1)
z = 2x - 10    .............. equation (2)
x + y + z = 92 ..............equation (3)

Now,
Substituting the value of "y" and "z" from equation (1) and (2), we get,

x + (3x) + (2x - 10) = 92
    x + 3x + 2x - 10 = 92
                  6x - 10 = 92
                         6x = 92 + 10
                           x = 102 / 6
                           x = 17

Now,
substituting the value of "x" in equation (1)
 y = 3 (17)
y = 51

Now,
Substituting the value of "x" in equation (2),

z = 2 (17 ) - 10
z = 34 - 10
z = 24


So, the numbers are 17, 51 and 24


NEVER HATE MATH!!!
3 0
3 years ago
The value of y is directly proportional to the value of x. If y =35 when x = 140, what is the value of y when x =70?
torisob [31]
17.5 because 140 divided by 35 is 17.5 and so is 70 divided by 35.
3 0
2 years ago
Chelsea deposits $600.00 into a bank account and is earning 8.5%simple interest. She decides to keep the account for 4 years. a)
snow_lady [41]

Answer:

$204 in interest

Step-by-step explanation:

Plug in each variable into the simple interest formula: I = PRT

P = $600

R = 8.5% (0.085)

T = 4 years

3 0
3 years ago
Other questions:
  • Two angles of a triangle measure 58° and 104°. What is the measure of the third angle of the triangle?
    15·1 answer
  • What’s the value and what makes the x in the equation -6(x+11)+ 2x = 70 true ?
    6·2 answers
  • I need help on this plzzzz help me^^^
    7·2 answers
  • Ramon earns $1,835 each month and pays $53.50 on electricity. To the nearest tenth of a percent, what percent of Ramon's earning
    11·1 answer
  • This is about intersecting chords theorem <br>PLEASE HELP ​
    7·1 answer
  • Find the slope between (1,5)(3,9)
    6·1 answer
  • I'm really confused I'm not that good in math
    6·1 answer
  • The sum of 6 and another number is 23, write and solve an equation to find the other number
    8·2 answers
  • The Brady &amp; Matthew Camera Company has just come out with their newest professional quality digital camera, the ToughPix1. T
    10·1 answer
  • 2 months ago, Blake used his credit card for a transaction of 400 dollars. The bank charges a rate of interest of
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!