# Arithmetic

Math
Consider the following series: 1,2,3,4,5,10,20,40....which starts as an arithmetic series? ...but after the first five terms becomes a geometric series. Prove that any positive integer can be written as a sum of distinct numbers from the series. I know how to do the base case

math
Given that the sum of the first 20 terms of an arithmetic sequence is 1150 and the fifth term is twice the second term . find: 1.The first term and the common difference 2. find the general formula

Algebra
Is this sequence 10, 15, 20, 25, 30 an arithmetic or geometric sequence? Then find the explicit formula and recursive formula for the given sequence.

math
The second term of an arithmetic progression is 8 and the eleventh term is -10 Find the first term, the common differrnce and sum to 15 terms

math
The first and the last terms of an Arithmetic Progression are 6 and 171 in that order. If there are 14 terms, find the 16th term of the Arithmetic Progression.

math
The 3rd term of an Arithmetic Progression is 10 more than the first term while the fifth term is 15 more than the second term. Find the sum of the 8th and 15th terms of the Arithmetic Progression if the 7th term is seven times the first term.

Math
Algebra 2 A sequence is of pyramids is created where the first pyramid has a height of 6 inches and a base area of 10 inches, for a volume of 20 cubic inches. The height of the next pyramid is twice the height of the previous pyramid. The input of the sequence is the position ...

MATH HELP ASAP
identify the sequence as arithmetic, geometric, or neither. please explain answer 1.6,0.8, 0.4, 0.2,...

indentify the sequence as arithmetic, geometric, or neither. 3,4.5,6,7.5,... a. arithmetic b. geometric c. neither please help i don't know the answer

MATH HELP ASAP
identify the sequence as arithmetic, geometric, or neither 3, 4.5,6,7.5,...

what is the sum of arithmetic series 2+5+8+...+260?

Algebra
1. Find the general rule for each arithmetic or geometric sequence. 2. Calculate the 10th term for each sequence. a) a=a sub n-1*n a sub one=9 b) a sub n=a sub n-1 + 8 a sub 1=-17 c) a sub n=a sub n-1 + 2 a sub 1=9 d) a=n*a sub n-1 a sub one=1 I don't understand how to ...

Algebra
Arithmetic Sequence : Determine whether f(n) is an arithmetic sequence, circle yes or no . Identify the common difference . __________________ 1. N 1 2 3 4 5 F(n). 2 4 6 8 10 ___________________

Math.
The 4th term of the arithmetic progression is15 and the9th term is 35 find the 15th term.

algebra
if 1, 2, 7 and 20, respectively, are added to the first terms of an arithmetic progression, a geometric progression of four terms is obtained. find the first term and common difference of the arithmetic progression the answers are both 3 .. but i don't know the solution, ...

Arithmetic sequence
Three consecutive terms of an arithmetic sequence have a sum of 12 and a product of -80 .Find the terms. [hint : let the terms be x - d, x and x + d . ]

maths
The first four terms of an arithmetic sequence are 2, x-y, 2x+y+7 and x-3y where x and y are constants. Find the x and y and hence find the sum of the first 30 terms.

maths
how many terms in the arithmetic series are needed to make a total of 204? 2 + 3.25 + 4.5 + .....

maths
An arithmetic series has first term 5 and a common difference 7 a) write down the 4th term and the 23rd term b) find the sum of the first 38 terms of this series.

Ic
Write an application that prompts the user for two integers and then prompts the user to enter an option as follows: 1 to add the two integers, 2 to subtract the second integer from the first, 3 to multiply the integers, and 4 to divide the first integer by the second. Display...

sequence
Select the first five terms in the arithmetic sequence an = 4n, starting with n =

sequences and Series
If 5 times the 5th term is equal to the 6 times the 6th term of an arithmetic sequence then its 11th term is.......

math
the 9th term of an arithmetic sequence is 29. the 16th term is 50. what is the 20th term ?

algebra
three numbers are in harmonic progression. If the third number were decreased by 4 they would be in arithmetic progression. If the third number were decreased by 3 they would be in geometric progression. Find the third term of the harmonic progression.

mats
If 5 times 5th term is equal to the 6times the 6th term of an arithmetic sequence,then its 11th is?.

Sequences 1. 14, 19, 24, 29,… a. Geometric, 34,39,44 b. Arithmetic,32,36,41 c. Arithmetic, 34, 39, 44 ** d. The sequence is neither 2. -4, 8, -16, 32, . . . . a. Arithmetic , 64, 128, 256 b. Geometric, -64 , 128, -256 ** c. Geometric, -48, 64, -80 d. Neither 3. 81, 27, 9, 3...

General arithmetic and reasoning
The ratio of the length to a width of a sheet is 3:2. If length is 24 meters, find out the width?

Math
The measures of the sides of a right triangle form an arithmetic sequence of common difference 2. What are these measures?

mathematics
if7 times the 7th terms ofan arithmetic progression is equal to 11 time is 11th terms, show that its 18th term is 0 can you find the 1st terms andthe common difference -justify your answer

maths
A) In an arithmetic progression the sum of the first ten terms is 50 and the fifth term is three times the second term (1) Calculate the first term (2)Calculate the sum of the 20 terms

math
identify the sequence 3888 , 216 , 12 , 2/3 , as arithmetic geometric neither of both

Physics
A man drags a 68.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 23.5° above the horizontal, and the strap is inclined 55.0° above the horizontal. The center of gravity of the crate coincides ...

math

Algebra 2
The deposits Ginny makes at her bank each month form an arithmetic sequence. The deposit for month 3 is \$150, and the deposit for month 5 is \$180. Answer these questions 1.what is common differences for each month? \$15 2.write explicit formula for arithmetic sequence 3.amount ...

Algebra 2
Will someone please check if I am right???? find the second and third term of the arithmetic sequence -7, __,__,-22,-27... Options: -12,-15*** My Answer -17,-12 -10,-17 -12,-17

arithmetic progression
four positive integers form an arithmetic progression . if the product of the first and the last terms is 70 and the second and third terms are 88, find the first term

Arithmetic progression
In an AP , Sn = 2n , S2n = n Find S4n

Math
So, this "kiddo" needs some help plz! You are having a discussion about sequences with your classmate. She insists that the sequence is 2, 3, 5, 8, and 12 must be either arithmetic or geometric. Is she correct. Explain. HELP I DO NOT UNDERSTAND THIS!!!!! D;

Math
What is the difference between geometric patterns (with numbers) and arithmetic patterns?

Math help asap!!! or someone help please
4. Which explains why the sequence 81, 3, 1/9,... is arithmetic or geometric? A)The sequence is arithmetic because it decreases by a factor of 1/27 B)The sequence is geometric because it decreases by a factor of 1/27 C)The sequence is arithmetic because it decreases by a ...

Math
What type of sequence is this? 2 , 3, 5, 8, 12 Arithmetic, geometric or neither

really no one is gonna help me in math
7,9,11,13...... A) arithmetic B) geometric C)both D)neither 2. 2,1,1/2,1/4........ A. arithmetic B. geometric C. both D. neither dude im helping and no one helps me 1-a 2-b

MATH
7,9,11,13...... A) arithmetic B) geometric C)both D)neither 2. 2,1,1/2,1/4........ A. arithmetic B. geometric C. both D. neither

math....number sequences
7,9,11,13...... A) arithmetic B) geometric C)both D)neither 2. 2,1,1/2,1/4........ A. arithmetic B. geometric C. both D. neither

arithmetic
in an arithmetic progression the 13th term is 27 and the 7th term is three times the second term find;the common difference,the first term and the sum of the first ten terms

Algebra
Reposting: The geometric mean and arithmetic mean of the two numbers are 8 and 17 respectively. 1. find the bigger number 2. find the smaller number 3. find the harmonic mean Thanks in advance to whoever will answer :)

Allgebra
The geometric and arithmetic mean of the two numbers are 8 and 17 respectively. 1. Find the bigger number. 2. Find the smaller number. 3. Find the harmonic mean.

Algebra
find the 12th term of the arithmetic progression 1/2, 1/6, 1/10

salary increases: A man gets a job with a salary of \$30000 a year. He is promised a \$2300 raise each subsequent year. Find the total earnings for a 10 year period. Arithmetic Sequence,:

math
The second term of an arithmetic progression is 50 and the 5th term is 65.calculate the value of the 40th term

Math
6,x,y,16 is a sequence of numbers.6,x.y form an arithmetic sequence.x,y,16 form a geometric sequence. Detrmine the values of x and y

Math
The sum of third and ninth terms of arithmetic series is 20 and the difference between the twelfth and fourth term is 32.determine the value of the first term and the constant difference.

maths
consider the arithmetic sequence which has the second term equal to 8 and the fifth term equal to 10 2.1.1 determine the common difference of this sequence

Math
A house worth \$350,000 when purchased was worth \$335.000 after the first year and \$320,000 after the second year. If the economy does not pick up and this trend continues, what will be the value of the house after 6 years. A) determine if is arithmetic or geometric. Write the ...

math
The first term of an arithmetic sequence is 2.The 12th term in the progression is 9 times bigger than the 2nd term. Find the common difference d.

A.P AND G.P AND A.M AND G.M
Find the arithmetic progression and sum of its first 20 terms whose arithmetic mean and geometric mean between first and third term is 10 and 8 respectively

progressions
Find the arithmetic progression and sum of its first 20 terms whose arithmetic mean and geometric mean between first and third term is 10 and 8 respectively

pre calculus
Sn= 2n^2+5n IS THE SUM OF THE FIRST N TERMS OF AN ARITHMETIC SERIES. determine first 3 terms

pre cal 11
the sum of the first n terms of an arithmetic series is Sn=2n^2+5n. Determine the first 3 terms. Help!!!

PLZ HELP MATH
this is pre calc arithmetic sequence. AT sea lvl pressure is 14.7 psi. It increases by 14.7 at every 30 ft descent. What is pressure at 1000 ft.

Math,english,further math,government,CRS,lit in english,yoruba,civic,agric,biology
The fourth and sixth term of an arithmetic progession are -4 and -10 respectively. Find A.the common difference B.the first term C.sum of the first twelve terms

Math
determine if the sequence is arithmetic. If it is, find the common difference.1. 35, 32, 29, 26

Math
32,48,72,108...Arithmetic or geometric I think it is arithmetic Then Find common difference or ratio multiple of 12? What are the next 3 terms 120,132,144 What is the "zero" term 12 not sure what this means though What is the equation? 12n * n

maths
the sum of the first 53 terms of an arithmetic series is 4 240 while the seventh term is equal to 20. Find the first term on common difference

maths
if the second term of an arithmetic sequence is 15 and the fifth term is 24. determine the third and fourth term of the sequence

maths
determind the arithmetic sequence if fourth term is6 and the eleventh term is _34?

maths
the sum of the first nine terms of an arithmetic sequence 216. The 1st, 3rd and 7th terms form the first three terms of a geometric sequence therefore find the common difference

math
An arithmetic progression has 2 as its first term. find its common difference if the sum of 33 terms is equal to six times the sum of 13 terms

Math
The sum of third and seventh term of an ascending arithmetic progression is 12 and their product is 32. Then find the ninth term?

Math
find p so that the numbers 7p+2, 5p+12, 2p-1...... form an arithmetic sequence

Maths
Determine the 10th 21st term of arithmetic sequence

math
The sum of the 3 terms in arithmetic sequence is 39.if these numbers is increased by 1,5 and 12 respectively the numbers would be in geometric progression. find the second term of the geometric progression?

arthmetic sequence
the third of an arithmetic sequence is 14 and the ninth tern is -1. Find the first four terms of the sequence.

Algebra
Find the next three terms 1. 14,19,24,29 A.geometric 34,39,44 B.arithmetic 32,36,41 C.arithmetic 34,39,44 D.The sequence is neither geometric or arithmetric I think the answer is c

maths
consider the following (k-4) ; (k+1) ;m ; 5k ... the first 3 terms are arithmetic the last 3terms are geometric. .. determine the values of m and k if both are positive integers

MATH
I forgot the arithmetic series formula and can't find it online

math
The 10th term of an arithmetic progress in 28 and the 7th term is 19.calculate the 1st,2nd and 3rd terms of the progression

math
The sum of the second ans the sixth terms of an arithmetic sequence is 4.Thw third term is 24 more than the 11th term. 1Determine the first three terms in the sequence.

Algebra
The 15th and 21st terms of an arithmetic sequence are -67 and -97. What is the 30th term? This is all I can figure out? -97- (-24)= -30 common difference. HELP!

Algebra
Determine the explicit formula for each arithmetic. The 9th and 10th yerm of an arithmetic sequence are -24 and -30 respectively. What is the 30th term?

Math
the second and sixth terms of an arithmetic sequence is 4. the third term is 24more than the 11th term. Determine the first three terms of the sequence

maths
The fifth term of an arithmetic sequence is 23 and the 12th term is 72. What is the value of the 10th term. Which term has a value of 268.

maths
The fifth term of an arithmetic sequence is 23 and 12th term is 72. And they say 1. Determine the first three terms of the sequences and the nth term. 2. What is the value of the 10th term. 3. Which term has a value of 268.

maths
The fifth term of an arithmetic sequence is 23 and the 12th term is 72. And they say first question 1.determine the first three terms of the sequences and the nth term. 2.what is the value of the 10th term. 3. Which term has a value of 268.

algebra
the seventh term of a arithmetic sequence is 72 and the tenth term of the sequence is 90. if the sequence is defined by a formula f(n), then find f(2). How would you do this?

Algebra 1 Honors
Write an equation for the nth term of the arithmetic sequence. Then graph the first five terms in the Sequence. -3,-8,-13,-18 I got 5n-8 as my formula. Then plugged 5 in for n and got 17 for the 5th number in the sequence. Is this correct?

Math
An arithmetic progression has 10 terms. Sum of the 10 terms is 220. Sum of the odd terms is 100. Find the first term and common difference.

Math
1. Identify the sequence. 3,888, 216, 12, 2/3... a. arithmetic b. geometric c. neither d. both 2. Find the value of the variables in the table. x = e, 5, 7, 10, 12 y = 18, 23, f, 48, 58 a. f = 33; e = 4 b. e = 33; f = 4 c. f = 30; e = 2 d. e = 30; 5 = 2 3. Which is D = 2zv ...

Math
Identify the sequence... 3,888, 216, 12, 2/3... a. arithmetic b. geometric c. neither d. both Is it c or d?

Math
Identify the sequence... 3,888, 216, 12, 2/3... a. arithmetic b. geometric c. neither d. both I got d, both. Because, you can divide 18 and 1/18. Is that right? Thanks anyone who answers. I'd very much appreciate that. :-]

Math
Three numbers form a geometric progression. If 4 is subtracted from the third term, then the three numbers will form an arithmetic progression. If, after this, 1 is subtracted from the second and third terms of the progression, then it will again result in a geometric ...

Number Sequence
2, 1, 1/2, 1/4... a. arithmetic b. geometric c. both d. neither Is it d? Thanks!

Algebra
What is the ninth term of the arithmetic sequence defined by the rule A(n)=-14+(n-1)(2) A)232 B)230 C)2 D)4 Thanks

algebra
a student worked w hours on tuesday x hours on wednesday y hours on thursday and z hours on friday which algebraic expression represent the average arithmetic mean number of hours per day the student worked for the four days for any valuesof w,x,y,and z

math
in an arithmetic sequence whose first term is 4, the 1st, 3rd and 7th terms form consecutive terms of geometric sequence, find the sum of the first three terms of the arithmetic sequence

Geography
Which country has lower arithmetic density? Canada or Brazil

La
5,-15,45,-135 is it arithmetic , geometric or neither ?

Algebra
1.Tell whether the sequence is arithmetic. If it is, what is the common difference? -19,-11,-3,5... A.yes;5 B.yes;6 C.yes;8 D.no 2.What is the slope of that passes through the pair of points? (-6,8),(2,3) A.-3/8 B.-1/8 C.-7/8 D.-5/8 3.Write an equation in point-slope form for ...

Math
In 1985, 10% of Americans had no close friends. On average, this has increased by approximately 0.77% per year a. Write a formula for the nth term of the arithmetic sequence that models the percentage of Americans with no close friends n years after 1984. b. If trends shown by...

Math
Write a formula for the general term (the nth term) of the arithmetic sequence shown below. Do not use a recursion formula. Then use the formula for a'n to find a20, the 20th term of the sequence. a'1 = -13, d = -5