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
nirvana33 [79]
3 years ago
5

Find the sum of 12th term of the following AP series 7,11 and 15.​

Mathematics
2 answers:
Ahat [919]3 years ago
7 0

Answer:the sum of the 12th term of the AP is 348

Step-by-step explanation:

7,11,15

Common difference=d=11-7

d=4

First term=7

Using the formula

Sn=n/2 x (2a+d x (n-1))

S12=12/2 x (2x7+4x(12-1))

S12=6 x (14+4x11)

S12=6 x (14+44)

S12=6 x 58

S12=348

Alexandra [31]3 years ago
4 0
It is adding 4 each time.

Just calculate the first 12 terms and add them up.

Term 1 = 7 + 4*0 = 7
Term 2 = 7 + 4*1 = 11
Term 3 = 7 + 4*2 = 15
Term 4 = 7 + 4*3 = 19
Term 5 = 7 + 4*4 = 23
Term 6 = 7 + 4*5 = 27
Term 7 = 7 + 4*6 = 31
Term 8 = 7 + 4*7 = 35
Term 9 = 7 + 4*8 = 39
Term 10 = 7 + 4*9 = 43
Term 11 = 7 + 4*10 = 47
Term 12 = 7 + 4*11 = 51

Sum of first 12 terms = 348
You might be interested in
If p(x) = x^2 + 7x + 3 is divided by x + 4, the remainder is <br> a0
Sphinxa [80]
Hope this helps you!

4 0
3 years ago
You start at (4,4). You move up 1 unit and left 7 units. Where do you end?
yaroslaw [1]

Answer: i believe it would be (-3 , 5)

Step-by-step explanation:

Correct me if im wrong

4 0
3 years ago
Read 2 more answers
What number has the same value as 14 tens
nasty-shy [4]
The number with the same value will be 40 because 10 tens make 100 and 4 tens make 40 so it wili  be 140
8 0
3 years ago
Read 2 more answers
Given the points (3, 2) and (6, 4), which of the following are true about the line passing through these points? The line has a
Ad libitum [116K]

Answer:

The slope is 2/3 and the function is y=2/3x  which is a direct variation function.

Step-by-step explanation:

To find the slope of a line between two points, we use the equation

m = (y2-y1)/ (x2-x1)

where (x1,y1) and (x2,y2) are the two points

m= (4-2)/(6-3)

  = 2/3

The slope of the line is 2/3

The equation of the line is

y-y1 = m(x-x1)

y-2 = 2/3(x-3)

Distribute

y-2 = 2/3x -2

Add 2 to each side

y-2+2 = 2/3x -2+2

y = 2/3x

This is a direct variation function

Let x = -6

y = 2/3(-6)

y = -4

(-6,-4)

3 0
3 years ago
For what value(s) of x are the following undefined? a 5x^2+x+11/x^2−4
irga5000 [103]

Answer:

Undefined at x = 2 and x = -2

Step-by-step explanation:

(5x²+x+11)/(x²-4)

Function becomes undefined when the denominator goes to zero.

x² - 4 = 0

x = 2, -2

4 0
3 years ago
Other questions:
  • A student would like to find the height of a statue. The length of the​ statue's right arm is 54 feet. The​ student's right arm
    9·2 answers
  • How do you write the algebraic notation when the scale factor is 3 ​
    5·1 answer
  • PLEASE HELP &amp; SHOW WORK , ITS URGENT <br> it’s appreciated &lt;3 !!
    9·2 answers
  • How can you solve an equation with a variable on both sides
    10·2 answers
  • PLEASE HELP ME ILL MARK AS BRAINLIEST
    13·2 answers
  • What is X^2 -8x+9=0 written in the form(x-P)^2 =q?
    15·1 answer
  • The piecewise function h(x) is shown on the graph. On a coordinate plane, a piecewise function has 2 lines. The first line has a
    11·1 answer
  • An emergency plumber charges $65 as a call-out fee plus an additional $75 per hour. He arrives at a house at 9:30 am and works t
    11·1 answer
  • Complete the table for the given rule.<br> Rule: y=2x
    14·2 answers
  • One angle in a triangle is 20 degrees more than the smallest angle in the triangle, while the other angle is 22 degrees more tha
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!