Thursday
June 20, 2013

# Homework Help: Math: Arithmetic

Recent Homework Questions About Arithmetic

Calculus
An arithmetic progression has terms a8 =23 and a20 =83 . What is the value of the term a12
Tuesday, June 18, 2013 at 10:13am

arithmetic
there is a unique number of which the square and the cube together use all numbers from 0 up to 9 exactly once. which number is this ?
Tuesday, June 18, 2013 at 12:34am

Maths
The third term of a sequence is 2(2/3) and the sixth term is 9. Find the first six terms when the sequence is; (a) arithmetic (b) geometric
Monday, June 17, 2013 at 9:38pm

Arithmetic Sequence Help!
The sum of 3 consecutive terms of an arithmetic sequence is 165. The second of these terms is 11 times the first. Find the 3 terms From what I gathered: S(3) = 165 t(2)= 11(t1) The given formulas are: Sn= n/2[2a+(n-1)d] and tn=a+(n-1)d I have no idea how to continue.
Monday, June 17, 2013 at 2:25pm

Maths
How to find Geometric mean if arithmetic and harmonic mean is given, The question is AM = 2700 and HM = 75, then find GM ?
Saturday, June 15, 2013 at 1:17pm

maths
find the 20th term of an arithmetic progression whose 6th term is 3 and 14th term is 19
Wednesday, June 12, 2013 at 4:18am

maths
find the 20th term of an arithmetic progression whose 6th term is 3 and 14th term is 19
Wednesday, June 12, 2013 at 4:16am

Math
1. One of the formulas for finding the partial sum of an arithmetic sequence is Sn = n(a1 + an) True 2. The value of a probability must be in the interval [0, 1]? True
Friday, June 7, 2013 at 3:13pm

Math
1. Find the sum of the first 21 terms of the arithmetic sequence given by the formula an = n+5 I see that I have to plug in numbers and get the terms...but i'm sure there's a shorter way to do this instead of plugging in 21 numbers. 2. The following infinite geometric ...
Friday, June 7, 2013 at 11:24am

Math
In a right triangle, there is arithmetic sequence. If the shortest side is 15 cm long, what is te length of the other 2 sides. ( hint use pytageron Therom)
Tuesday, June 4, 2013 at 9:44am

Math
In a right triangle, there is arithmetic sequence. If the shortest side is 15 cm long, what is te length of the other 2 sides. ( hint use pytageron Therom)
Tuesday, June 4, 2013 at 9:43am

math
The lower leg of a right triangle is 8 cm in length. Calculate the other two knowing that the sides of the triangle form an arithmetic sequence. please give me step by step answers thanks
Monday, June 3, 2013 at 4:22pm

Math question
In an arithmetic series, the 15th term is 43 and the sum of the first 15 terms is 120. Add the first 20 terms of the series.
Sunday, June 2, 2013 at 7:41pm

arithmetic
Assume you roll a fair dice twice. Two rolls are independent and identically distributed, with probability of rolling a particular number being 1/6. So, for instance, the probability of rolling 5 and then 2 is P(5,2) = P(5) ⋅ P(2) = 1/6 ⋅ 1/6 = 1/36 Consider a ...
Saturday, June 1, 2013 at 8:17pm

arithmetic
Assume you have an unfair coin - the one that lands heads with probability P (not known beforehand). You have rolled such a coin 20 times and got 16 heads and 4 tails. What is the best estimator of P, Pˆ? (Hint: it is the one based on sample mean.)
Saturday, June 1, 2013 at 8:16pm

arithmetic
Assume you roll a fair dice twice. Two rolls are independent and identically distributed, with probability of rolling a particular number being 1/6. So, for instance, the probability of rolling 5 and then 2 is P(5,2) = P(5) ⋅ P(2) = 1/6 ⋅ 1/6 = 1/36 Consider a ...
Saturday, June 1, 2013 at 8:15pm

How to get quick responses to your math questions
Math is a wide subject, ranging from K to 11, college and university. Then there is algebra, trigonometry, geometry, arithmetic, calculus, number theory, ... etc. Not all teachers answer all math questions (many do). If you would give a little more detail on which branch of ...
Saturday, May 25, 2013 at 9:45am

Algebra
80. Determine the sum for the arithmetic series: n = 37, t1 = 23, t37 = 203 a. 5631 b. 8362 c. 6742 d. 4181 81. Determine the sum for the arithmetic series: n = 100, t1 = 17, t100 = 215 a. 9900 b. 3350 c. 11,600 d. 990 82. Determine the sum for the geometric series: n=10, r=-2...
Tuesday, May 21, 2013 at 1:38pm

Math
Please help. 51. Solve: 125=(x3)/0.3^-3 a.7 b.14 c.15 d.9 53. 49x-2 = 7Ö 7 a.-5/4 b.5/4 c.11/4 d.-11/4 60. Simplify: 2log^3 6 - log^3 4 a.3 b.6 c.4 d.2 61. Solve the equation: logb (x^2 + 7) = 2/3logb 64 a.9 b.3 c. √23 d. ±3 62. Solve: (The fifth root of x) ...
Tuesday, May 21, 2013 at 1:29pm

algebra
is this a arithmetic, or geometric sequence -96,-48,-24,-12,......
Wednesday, May 15, 2013 at 1:16pm

arithmetic
there are n arithmetic means between 5 and 32 such that the ratio between the 3rd and 7th means is 7:13,find the value of n.
Tuesday, May 14, 2013 at 1:45pm

TRIG
in an arithmetic sequence a1=4 and d=8 which term is 428 Show your work
Saturday, May 11, 2013 at 8:32pm

Math
5 distinct positive reals form an arithmetic progression. The 1st, 2nd and 5th term form a geometric progression. If the product of these 5 numbers is 124 4/9, what is the product of the 3 terms of the geometric progression? Note: The phase "form an arithmetic progression...
Saturday, May 11, 2013 at 3:56am

math
-4, 8, -16, 32 arithmetic 64, 128, 256 geometric -64, 128, -256 Geometric -48, 64, -80 the sequence is neither geometric nor arithmetic
Thursday, May 9, 2013 at 6:26pm

arithmetic
james used the rule add 2 to create a sequence.the he used the rule add 12 to create a second sequence.what are the first five terms in each sequence james created?<3
Tuesday, May 7, 2013 at 3:27pm

Social Studies
I need a 4 paragraph essay on the devil's arithmetic. my theme is "no laugh, no hope. NO hope, no life." THANK YOU (: im not passing and i reallllllly neeed help on this
Monday, May 6, 2013 at 9:33am

7th Grade Math for Steve.. or Ms. Sue
Determine whether each sequence is arithmetic or geometric. Find the next three terms. 1. 14, 19, 24, 29, . . . (1 point) geometric, 34, 39, 44 arithmetic, 32, 36, 41 arithmetic, 34, 39, 44 ** The sequence is neither geometric nor arithmetic. 2. –4, 8, –16, 32...
Sunday, April 28, 2013 at 4:20pm

maths
find a6 for an arithmetic sequence where a1=3x+1 and d=2x+6. 2.A display of cans on a grocery shelf consists of 20 cans on the botton, 18 cans inthe next row, and so on in an arithmic sequence, until the to[p row has four cans. how many cans , in total, are in the display?
Sunday, April 28, 2013 at 2:36am

math
if 1,x,y is a geometric sequence and x,y,3 is an arithmetic sequence, compute the maximum value of x+y
Saturday, April 27, 2013 at 10:25am

math help please ASAP
2. Identify the sequence as arithmetic, geometric, or neither. 1.6, 0.8, 0.4, 0.2, . . . (1 point) arithmetic geometric neither 3. 5 • 3^n (1 point) 15, 30, 45, 60 5, 15, 45, 135 0, 15, 45, 135 15, 45, 135, 405 4. Use the function rule ƒ(x) = n • |–1|^n. ...
Thursday, April 25, 2013 at 7:52pm

arithmetic
a flower floats on the surface of lake water. its level above the lake surface is 5.5 cm. then a sudden gust of wind comes and flower sinks 10 cm far from its original point, what is the depth of lake at the point where the flower was floating
Friday, April 19, 2013 at 11:02pm

arithmetic mean
what is the average of 88 94 98 84
Thursday, April 18, 2013 at 8:37am

HELP!!! Math
You visit the Grand Canyon and drop a penny off the edge of a cliff. The distance the penny will fall is 16 feet the first second, 48 feet the next second, 80 feet the third second, and so on in an arithmetic sequence. What is the total distance the object fall in 6 seconds?
Tuesday, April 16, 2013 at 11:34pm

A display of cans on a grocery shelf consists of 20 cans on the bottom, 18 cans in the next row, and so on in an arithmetic sequence, until the top row has 4 cans. How many cans, in total, are in the display?
Tuesday, April 16, 2013 at 11:29pm

Find a6 for an arithmetic sequence where a1=3x+1 and d=2x+6 . I can't even solve it because I do not have any idea.
Tuesday, April 16, 2013 at 11:23pm

arithmetic
If the first term of an arithmetic sequence is 2 and the 7th term is 3278, what is the common difference?
Tuesday, April 16, 2013 at 10:29pm

math
An arithmetic sequence is represented in the following table. Enter the missing term of the sequence. 10,-2,-14,-26,?...
Tuesday, April 16, 2013 at 6:53pm

arithmetic
play 160 games and won 60% how many games did the team win
Sunday, April 14, 2013 at 5:09pm

arithmetic
which of the following is the leas0. 0.015 0.105 or 0.15
Sunday, April 14, 2013 at 4:56pm

arithmetic
which of the following is the least
Sunday, April 14, 2013 at 3:39pm

algebra
Select the first five terms in the arithmetic sequence an = 6n, starting with n = 1.
Saturday, April 13, 2013 at 9:25pm

8th grade math!!!!! :)
Determine whether each sequence is arithmetic or geometric. Find the next three terms. 1. 14, 19, 24, 29, . . . (1 point) geometric, 34, 39, 44 arithmetic, 32, 36, 41 arithmetic, 34, 39, 44 The sequence is neither geometric nor arithmetic. 2. –4, 8, –16, 32, . . . (1...
Thursday, April 11, 2013 at 4:46pm

MATHs
The three terms x+12, 3x+5 and 2x+25 are the first three terms of an arithmetic progression. What is the value of x?
Friday, April 5, 2013 at 8:35pm

math
The three terms x+12, 3x+5 and 2x+25 are the first three terms of an arithmetic progression. What is the value of x?
Friday, April 5, 2013 at 7:47am

Algebra 2
The simple formula for the nth term of an arithmetic sequence is an = 4n + 16. What is the explicit formula corresponding to the simple formula?
Thursday, April 4, 2013 at 6:53pm

Algebra
The simple formula for the nth term of an arithmetic sequence is an = 4n + 16. What is the explicit formula corresponding to the simple formula?
Thursday, April 4, 2013 at 6:37pm

I have two left I need help with and dont understand. Find the partial sum S6 1. An=3n+2 2. Find the number of terms n in an arithmetic sequence if a1=20, d=5, and An=75.
Wednesday, April 3, 2013 at 10:36pm

Algebra
I have 3 questions I'm stuck on and would love for someone to explain and show me how to solve them so I can also solve the other one. Find the partial sum S6 1. An=3n+2 2. Find the number of terms n in an arithmetic sequence if a1=20, d=5, and An=75. 3. Find the general ...
Wednesday, April 3, 2013 at 9:42pm

Algebra 3
find the sum of each finite arithmetic series 8+9+10+...+15
Wednesday, April 3, 2013 at 7:49pm

arithmetic
what is 6.3x100
Wednesday, April 3, 2013 at 6:02pm

Algebra
I have a few problems I need some help with. The first is Evaluate the sum. 1. There is an E like symbol on the top is 10 on the bottom n=1 and to the right (7-2n) 2. The next question is find a10 for an arithmetic sequence with a1=6 and d=10 3. Find the number of terms in the...
Wednesday, April 3, 2013 at 3:20pm

Math(arithmetic & Geometric Series)
1)The sum of 6 terms of an arithmetic series is 45, the sum of 12 terms is -8. Find the first term and the common difference? 2)If in a geometric sequence the sum of the second and the third is 20 and the sum of the fourth and fifth is 320, find the common ratio and the first ...
Saturday, March 23, 2013 at 7:38pm

arithmetic
10.7 div by 315.00=
Saturday, March 23, 2013 at 2:27pm

algebra 2\arithmetic series
on the moon ,afalling object falls jest 2.65feet in the first second afther
Saturday, March 23, 2013 at 2:24pm

Algebra
Identify the sequence as arithmetic, geometric, or neither. Explain your answer. 1.6, 0.8, 0.4, 0.2, . . . I think it is geometric - divisible by 1/2...? Is that right?
Thursday, March 21, 2013 at 11:44am

maths
What is the smallest positive common difference of a 6-term arithmetic progression consisting entirely of (positive) prime numbers?
Thursday, March 21, 2013 at 6:44am

maths
How many integers appear in both of the following arithmetic progressions: A1:2,9,16,……,2+(1000−1)&​times;7 A2:3,12,…,21,…,3+(1000−1​)×9 Details and assumptions Since 2 appears in A1 but not in A2, it does not appear in both of...
Thursday, March 21, 2013 at 6:37am

Algebra
Determine whether each sequence is arithmetic or geometric. Find the next three terms. 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 nor arithmetic. I think this is C...? What are the first ...
Tuesday, March 19, 2013 at 10:48am

algebra
Determine whether each sequence is arithmetic or geometric. Find the next three terms. 4, 8, –16, 32, . . . A.arithmetic, 64, 128, 256 B.geometric, –64, 128, –256 C.geometric, –48, 64, –80 .DThe sequence is neither geometric nor arithmetic. I think it...
Tuesday, March 19, 2013 at 10:41am

Arithmetic
A box in a college bookstore contains books, and each book in the box is a history book, an English book or a science book. If one-third of these books are history books and one-sixth are English books, what fraction of the books are science books? A. 1/3 B. 1/2 C. 2/3 D. 3/4...
Tuesday, March 19, 2013 at 10:24am

Arithmetic
A box in a college bookstore contains books, and each book in the box is a history book, an English book or a science book. If one-third of these books are history books and one-sixth are English books, what fraction of the books are science books?
Tuesday, March 19, 2013 at 10:23am

arithmetic
The measure of two angles of a triangle are 35* and 45*. What is the measure of the third angle of the triangle? A. 95* B. 100* C. 105 D. 110*
Tuesday, March 19, 2013 at 10:15am

What is arithmetic and geometric sequences?
Monday, March 18, 2013 at 12:43pm

number theoRY!!!
How many integers appear in both of the following arithmetic progressions: A1: 2, 9, 16,.....2+(1000-1)*7 A2: 3, 12, 21,.....3+(1000-1)*9 Since 2 appears in A1 but not in A2, it does not appear in both of the arithmetic progressions.
Monday, March 18, 2013 at 3:11am

mathematics
the 1st term of arithmetic series is 2 .the 1st ,3rd and 11th terms are the first the terms of a geometric series. find the 6 terms of the arithemetic series
Thursday, March 14, 2013 at 10:54pm

arithmetic
If I cut a cake in 20 pieces & I ate 3/5 of the pieces , how many pieces did I et
Wednesday, March 13, 2013 at 5:04pm

MAths algebra
Tiger woods won the Buick Invitational.The following scorecard shows the result of Round1.there are 18 holes? per round and the table shows the number of times woods got each type of score. Score on a hole and Number of times score occurred Eagle (-2) 2 Birdie(-1) 4 Par (0) 10...
Tuesday, March 12, 2013 at 11:31am

Math
In right triangle ABC what is the arithmetic mean (average), in degrees, of the measures of the two smallest angles? Explain how the answer is 45 degrees.
Monday, March 11, 2013 at 3:05pm

math
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Friday, March 8, 2013 at 11:22am

Algebra
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Thursday, March 7, 2013 at 10:46pm

pre-calculus
find the common difference in an arithmetic sequence in which a(sub 15)-a(sub7)=-1. what should i start with ??
Thursday, March 7, 2013 at 8:46pm

math
The sum of the first 10 terms of an arithmetic series is 145 and the sum of its fourth and ninth term is five times the third the..determine the first term and constant difference
Thursday, March 7, 2013 at 2:43pm

arithmetic
the sum of two distinct numbers is 20,and their G.M is 6. find the numbers
Wednesday, March 6, 2013 at 9:18pm

arithmetic
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Wednesday, March 6, 2013 at 11:16am

algebra
Find the 11th term of the arithmetic sequence 7, 4.4, 1.8, -0.8, … A. -33 B. -19 C. 33 D. 19 B
Tuesday, March 5, 2013 at 9:28pm

poetry
What is the authors tone in the poem arithmetic?
Monday, March 4, 2013 at 8:25pm

arithmetic
find the APR to the nearest half percent, for the following data. purchase price \$3500, down payment \$500, add-on interest rate 7%, # of payments 18
Monday, March 4, 2013 at 6:35pm

Algebra
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Monday, March 4, 2013 at 4:53pm

Algebra
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Monday, March 4, 2013 at 12:26am

MATH
An arithmetic student needs at least a 70% average to receive credit for the course. If she scored 86%, 77%, and 64% on the first three exams, what is the lowest score she can get on the fourth exam to receive credit for the course?
Sunday, February 24, 2013 at 9:23pm

maths-ARITHMETIC PROGRESSIONS
A person buys a refrigerator for rupees 12000. He pays rupees 6000 in cash and agrees to pay the balance in 12 annual instalments of rupees 500 each. If the rate of interest is 12% and he pays it with instalments on the unpaid amount, how much did the refrigerator cost him
Sunday, February 24, 2013 at 2:29am

math
Find the arithmetic sequence if the fourth term is -6 and the eleventh term is -34
Tuesday, February 19, 2013 at 3:15pm

Arithmetic
three numbers in an arithmetic sequence sum up to six. if you add 1 to the first number, 2 to the second number, and 5 to the third number, what are the orginal three numbers?
Tuesday, February 19, 2013 at 5:49am

invest
You budget \$100 for parking each month. Each day you use the downtown parking lot, it costs you \$5. Write a rule to represent the amountof money left in your monthly budget as an arithmetic sequence. How much money is left in your budget after you have used the downtown ...
Sunday, February 17, 2013 at 10:05pm

Algebra
invest \$ 3000 and save \$100 each month. Write a rule to represent the total amount of money invest into your account as arithmetic sequence. How much money will you have invested after 12 month?
Sunday, February 17, 2013 at 9:31pm

math
what formula use in solving or finding for the 9th term of a number in arithmetic series and sequences?
Saturday, February 16, 2013 at 6:48am

math
what method i need to use in solving arithmetic and geometric sequences and series?
Saturday, February 16, 2013 at 6:44am

arithmetic
The city counsel is trying to buy fencing the size of 740 meters. One fencing company is offering \$24.75 per meter another is offering \$225 per decameter. Which is the better buy???
Friday, February 15, 2013 at 1:56pm

algebra
Robin bought a computer for \$1,250. It will depreciate, or decrease in value, by 10% each year that she owns it. a) Is the sequence formed by the value at the beginning of each year arithmetic, geometric, or neither? Explain. b) Write an explicit formula to represent the ...
Tuesday, February 12, 2013 at 5:34pm

maths
what is a simple definition of consumer arithmetic for a 7th grader
Tuesday, February 12, 2013 at 1:20pm

algebra
I have 3 questions I need help with. 1) what is the 15th term of the sequence 81,27,9,... 2) what is a possible value for the missing term of the geometric sequence 39,_,975,_ 3) what is the sum of the finite arithmetic series (-5)+0+5+10+..+65
Tuesday, February 12, 2013 at 11:29am

Math (Pre-Cal)
There is exactly one triangle the length of whose sides are integers in arithmetic progression and whose area is 156 square units. Find the perimeter of this triangle.
Monday, February 11, 2013 at 7:57pm

arithmetic
A group of friends are planning a road trip. If they all contributed \$24, then they would be \$6 short of the total. If they all contributed \$25, then they would have \$3 more than needed. What is the total cost of the trip?
Monday, February 11, 2013 at 11:08am

Pre-calculus
a) A particular ball always rebounds 3/5 the distance it falls. If the ball is dropped from a height of 5 meters, how far will it travel before coming to a stop? Explain the reasoning. b) Prove that if a1, a2, a3, ... is a geometric sequence,then ln(a1), ln(a2), ln(a3)... is ...
Saturday, February 9, 2013 at 4:50pm

Math
The sixth term of an arithmetic progression is 265 and the sum of the first 5 terms is 1445. Find the minimum value of n so that the sum of the first n terms is negative.
Saturday, February 9, 2013 at 12:28pm

arithmetic
determine the secon termof an A.P whose sixth term is 12 and eighth term is 22?
Saturday, February 9, 2013 at 9:48am

Mathematics
The 3rd and 8th term of an arithmetic progression A.P are -9 and 26.what their common difference nd first term?
Thursday, February 7, 2013 at 11:51pm

arithmetic
What number is 7 more than another number their answer is 23 Find the numbers.
Wednesday, February 6, 2013 at 8:09pm

math
the average (arithmetic mean) of a and b is 6 and the average of a, b, c is 11. What is the value of c?
Tuesday, February 5, 2013 at 7:53pm

Maths
1..The first 2 terms of a geometric progression are the same as the first two terms of an arithmetic progression.The first term is 12 and is greater than the second term.The sum of the first 3 terms od the arithmetic progression is 4/3 less than the sum of the first 3 terms of...
Sunday, February 3, 2013 at 4:35pm

Maths
Eric thinks of 2 sequences.One is geometric and the other arithmetic.Both sequences start with the number 3.The common ratio of the geometric sequence is the same as the common difference of the arithmetic sequence.If the 6-th term of the geometric sequence is 96.Find the ...
Sunday, February 3, 2013 at 4:27pm

Maths
An arithmetic and a geometric sequence have the same first terms.(2)....and the same second term say X..The sum of the first 3 terms of the arithmetic sequence equals to the third term of the geometric sequence.Calculate the first 3 terms of each sequences
Sunday, February 3, 2013 at 12:08pm

To Jessica
I have now corrected two of your replies in which you gave incorrect solutions. Unless you know what you are doing, please don't answer any questions dealing with topics not familiar to you . I know everybody makes mistakes, I make my share, but those are usually typos or ...
Thursday, January 31, 2013 at 9:56pm

math
be found arithmetic series 3a2-a6=-a2 a3+a4=19
Tuesday, January 29, 2013 at 6:27pm

math
3___,___,20 (arithmetic)
Tuesday, January 29, 2013 at 5:39pm

Math
The fifth term of an arithmetic progression is three times the second term,and the third term is 10.a)What is the first term,b)the common difference and c)the 15th term?
Sunday, January 27, 2013 at 1:17pm

It's about arithmetic sequence . . (the sum) SOLUTION PLEASE THANK YOU SO MUCH 1. A runner begins training on July 1 by running a kilometer, and increases the length of the run by 0.2 km/day. Find the length ofthe run in July 18 . 2.Bowling pins are set up in four rows ...
Thursday, January 24, 2013 at 10:39am

It's about arithmetic sequence . . (the sum) SOLUTION PLEASE THANK YOU SO MUCH 1. A runner begins training on July 1 by running a kilometer, and increases the length of the run by 0.2 km/day. Find the length ofthe run in July 18 . 2.Bowling pins are set up in four rows ...
Thursday, January 24, 2013 at 10:27am

Math
Find the no. of terms 1. 3,5,7...33 2.-5,-1,3,...75 Solve each problem. 1. In the Arithmetic sequence 5,8,11,14.... what is n if a sub n is 32? 2.Find the sum of the first 20 terms of the arithmetic sequence -15,-7,31,43...
Monday, January 21, 2013 at 5:16am

math
The 6th term of an arithmetic sequence is x while the 11th is y find the 1st 2 terms
Sunday, January 20, 2013 at 9:04am

Algebra
Is the series 72, 48, 32,... an arithmetic or geometric series. WHat is common difference or ratio
Thursday, January 17, 2013 at 4:10pm

arithmetic
change 12/23 into a decimal to the nearest hundreth's
Wednesday, January 16, 2013 at 4:42pm

arithmetic
500 words / 8 minutes whats the unit rate
Monday, January 14, 2013 at 6:53pm

arithmetic
Using math to fine 9:20 am to 5:05 pm
Monday, January 14, 2013 at 6:21pm

Math
Is there a way to find the term number of a sum in an arithmetic series? Like if you had the sum of the first 12 terms in a series could you find the term value of term 12 using the sum? For example in one of my previous questions : For each series, calculate t12 and S12 a) 37...
Saturday, January 12, 2013 at 4:57pm

Math
Determine the sum of the first 20 terms of the arithmetic sequence in which ... f) the 7th term is 43 and the 13th term is 109 I know you can make two equations : 43 = a + 6d and 109 = a + 12 d And subtract them to get d = 11 But I know there's another way to get d, that ...
Saturday, January 12, 2013 at 4:51pm

math
term given by x+2,3x-1,and 4x-1 form an arithmetic sequence. find the value of x. i didn't get it how to start this question and how it forms arithmetic sequence?
Wednesday, January 9, 2013 at 6:58pm

Math
I'm learning series and sequences (grade 11). Please check that my steps show I understand what I'm doing/the concept and my answer as well: 5. The consecutive terms of an arithmetic sequences are 3.6, y, 8.2. Find the value of y. This seems to be a sequence question ...
Tuesday, January 8, 2013 at 6:02pm

arithmetic progression
If sum of first 21 terms of an arithmetic progression is 13 and that of first 13 terms is 21, show that sum of first 34 terms is -34 ?
Tuesday, January 8, 2013 at 9:28am

math
How will I know the equation of a sequence if it is not arithmetic nor geometric sequence?
Saturday, January 5, 2013 at 5:53pm

SeQuEnCeS and SeRiEs: HELP PLZ!
The first three terms of the sequence -8,x,y,72... form an arithmetic sequence, while the second, third and fourth terms form a geometric sequence. Determine x and y.
Friday, January 4, 2013 at 2:19pm

Can someone help me?!
The 1st, 5th and 13th terms of an arithmetic sequence are the first three terms of a geometric sequence with a common ratio 2. If the 21st term of the arithmetic sequence is 72, calculate the sum of the first 10 terms of the geometric sequence.
Thursday, January 3, 2013 at 6:06pm

math
first term of the arithmetic sequence is 13. two other terms of the sequence are 37 and 73. common difference is consecutive terms integers. determine all possible values for 100th term.
Wednesday, January 2, 2013 at 12:35am

math help!
the 10th term is 34 of arithmetic series and the sum of the 20th term is 710 i.e S20=710.what is the 25th term?
Tuesday, January 1, 2013 at 11:34pm

math
the 10th term is 34 of arithmetic series and the sum of the 20th term is 710.what is the 25th term?
Tuesday, January 1, 2013 at 11:11pm

math
t11=19 and t17=61.then what will be S12? arithmetic series question
Tuesday, January 1, 2013 at 6:27pm

maths-Arithmetic progression
Prove that mean of squares of first n natural numbers is (n+1)(2n+1)/6
Thursday, December 27, 2012 at 11:26am

maths-Arithmetic progression
A ladder has rungs 25 cm apart.The rungs decrease uniformly in length from 45 cm at the bottom to 25 cm at the top.If the top and the botom rungs are two nd a half metre apart, what is the length of the wood required for the rungs
Wednesday, December 26, 2012 at 7:22am

Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...
Sunday, December 23, 2012 at 11:14pm

Alegbra
Suppose the modified quota is 2.77. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...
Sunday, December 23, 2012 at 7:14pm

Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...
Sunday, December 23, 2012 at 6:11pm

Math *URGENT
Please give the answers and solutions for each. 1.If the second term is 2 and the seventh term of a geometric sequence is 64, find the 12th term. 2. Which term if the geometric sequence 18,54,162,486,... is 3,188,646? 3. Determine the geometric mean of 8 and 288 4.Find x if ...
Thursday, December 20, 2012 at 9:37pm

hi
What is the sixth term of the arithmetic sequence if the 10th term is 33 and the 15th term is 53.
Sunday, December 9, 2012 at 6:36am

maths
the sum of first 8 terms of an arithmetic progression is 156.the ratio of its 12th term to its 68th term is 1:5.calculate the first term and the fifteenth term. please help this questions please.
Monday, December 3, 2012 at 6:16am

CALCULUS
The masses of 10 books are found to be in an arithmetic sequence. If their total mass is 13 kg and the lightest book has a mass of 400 grams, what is the mass of the heaviest book? 2,000 grams 2,100 grams 2,200 grams 2,300 grams 2,700 grams
Tuesday, November 27, 2012 at 11:07am

Chemistry
Use van der Waals’ equation to calculate the pressure exerted by 2.33 mol of ammo- nia at −3.7◦C in a 1.25 L container. The van der Waals’ constants for ammonia are a = 4.00 L2·atm/mol2 and b = 0.0400 L/mol. (The values for a and b have been ...
Tuesday, November 20, 2012 at 6:57pm

arithmetic
Write 8tenth with common fraction and decimal fraction
Monday, November 19, 2012 at 2:15pm

arithmetic
If you have 3.14 lbs of a food and it costs .88 a lbs. then how much money would that 3.14 cost?
Thursday, November 15, 2012 at 5:54pm

math
What is the sum of a 22–term arithmetic sequence where the first term is 56 and the last term is –28
Wednesday, November 14, 2012 at 5:24pm

arithmetic
does -9 + 2 equal 2 + (-9)?justify your answer.
Wednesday, November 14, 2012 at 12:21am

arithmetic
Amanda is making xookies for a charity event. She expects 10 people to come. She wants to have 3 cookies for each person. How can Amanda use a patter to find the product for 6 x 10?
Tuesday, November 6, 2012 at 7:01pm

math
Find the sum of the first 33 terms of the arithmetic sequence whose first term is 3 and whose 33rd term is -253
Tuesday, October 30, 2012 at 1:12pm

Algebra 2
Determine if the sequence is arithmetic, geometric, or neither. If it is arithmetic or geometric, write a rule. 4,1,0,1,4 My answer: Neither (-2)^2 (-1)^2 0^2 1^2 2^2 Is it correct?
Friday, October 26, 2012 at 4:13pm

arithmetic
If a blue box has 5 times as many marbles as a red box and the blue box has 24 more marbles than the red box how many marbles are in each box?
Tuesday, October 23, 2012 at 10:47pm

Math Statistics
What is the difference between "weighted mean" and "arithmetic mean?"
Friday, October 19, 2012 at 8:23am

arithmetic
\$30.00 x .6/2-\$17.50=
Thursday, October 18, 2012 at 7:42pm

arithmetic
I am greater than 200 but less than 500. The sum of my digits is 18. the product of my tens place digit and my 100's place digit equal 20. What digit am I ???
Sunday, October 14, 2012 at 7:21pm

arithmetic
How is eight hundred twenty-six thousandths written in decimal form?
Monday, October 8, 2012 at 7:23pm

arithmetic
round to the nearest hundered and add the rounded numbers:385,4012,856
Wednesday, October 3, 2012 at 8:39am

Arithmetic Sequence
Given the third term of an arithmetic sequence less than the fourth term by three. The seventh term is two times the fifth term. Find the common difference and the first term.
Sunday, September 30, 2012 at 5:31am

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