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]
2 years ago
5

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

Mathematics
2 answers:
Ahat [919]2 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]2 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
Kinsey purchased a bushel of large apples that weigh about 48 pounds.the bushel contains 96 apples what is the weight of one app
Elenna [48]
Each with half a pound.
6 0
2 years ago
Read 2 more answers
Find the simple interest for $3200 invested at 7% for 2 years.
Artemon [7]

Answer:

$448

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 7%/100 = 0.07 per year,

then, solving our equation

I = 3200 × 0.07 × 2 = 448

I = $ 448.00

USE THE EQUATION Interest= Principal x rate x time

3 0
2 years ago
My Christmas present to you​
oksano4ka [1.4K]

Answer:

Step-by-step explanation:

if you need help let me know

8 0
2 years ago
Read 2 more answers
What is the simplest form of ^3 square root 27a^3b^7
Irina-Kira [14]
\bf \sqrt[3]{27a^3b^7}\quad 
\begin{cases}
27=3\cdot 3\cdot 3\\
\qquad 3^3\\
b^7=b^{3+3+1}\\
\qquad b^3b^3b^1\\
\qquad (b^2)^3b^1
\end{cases}\implies \sqrt[3]{3^3a^3(b^2)^3b^1}
\\\\\\
3ab^2\sqrt[3]{b^1}\implies 3ab^2\sqrt[3]{b}
4 0
3 years ago
Read 2 more answers
Find the area of the shape shown below.
erastovalidia [21]

Answer:

10

Step-by-step explanation:

2x2=4

1x2=2

2x2=4

4+2+4=10

write this down if u need to show work

8 0
3 years ago
Other questions:
  • The blue lake trail is 11 3/8 miles long. Gemma has hiked 2 1/3 miles each hour for 3 hours. How far is she from the end of the
    9·1 answer
  • What is the reciprocal of 7 1/3? whats the reciprocal?<br>​
    14·2 answers
  • Help me asap i really need this
    10·1 answer
  • What is the root square of 10,000,000
    13·2 answers
  • please help me i have a huge science test that i have to study for after this so PLEASE HELP ME GET THE ANSWER
    6·1 answer
  • 3c - 4 = 14 solve the equation​
    5·1 answer
  • I need to turn this in please help
    15·1 answer
  • Find the perimeter of a square with sides that measure (2/3)g centimeters.
    14·2 answers
  • Each tile is 3/2 feet by 3/2 feet. There are 10 tiles on the bathroom floor.
    13·1 answer
  • What is the equation of the line that passes through the point (8, -8) and has a slope of -1
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!