Saturday

February 13, 2016
**arithmetic progression**

the 9th term of an AP is 52 while the 12th term is 70. find the sum of it's 20th term?
*Tuesday, August 6, 2013 by oladepo*

**Algebra/Number Theory**

In a sequence of four positive numbers, the first three are in geometric progression and the last three are in arithmetic progression. The first number is 12 and the last number is 452. The sum of the two middle numbers can be written as ab where a and b are coprime positive ...
*Tuesday, July 23, 2013 by John Berkhamp*

**math**

bob make 720 telephone calls each year. what is the average (arithmetic mean) number of calls that bob makes per month 60 70 80 100 120
*Tuesday, July 16, 2013 by ?*

**Math (Geometric Progression)**

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 phrase "form an arithmetic ...
*Saturday, June 22, 2013 by Shin*

**Calculus**

An arithmetic progression has terms a8 =23 and a20 =83 . What is the value of the term a12
*Tuesday, June 18, 2013 by Tony*

**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 by Akansha*

**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 by Shane*

**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 by Alice*

**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 by Steve*

**maths**

find the 20th term of an arithmetic progression whose 6th term is 3 and 14th term is 19
*Wednesday, June 12, 2013 by thabang*

**maths**

find the 20th term of an arithmetic progression whose 6th term is 3 and 14th term is 19
*Wednesday, June 12, 2013 by thabang*

**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 by mysterychicken*

**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 by mysterychicken*

**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 by Sarah*

**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 by Sarah*

**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 by saraah*

**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 by Anonymous*

**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 by Anonymous*

**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 by Anonymous*

**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 by Anonymous*

**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 by MathMate*

**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 by Holly*

**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 by Holly*

**algebra**

is this a arithmetic, or geometric sequence -96,-48,-24,-12,......
*Wednesday, May 15, 2013 by tammy*

**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 by Hussain*

**TRIG**

in an arithmetic sequence a1=4 and d=8 which term is 428 Show your work
*Saturday, May 11, 2013 by Alex*

**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 by Shin*

**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 by Nisabel*

**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 by katherine*

**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 by Kali*

**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 by Gabby*

**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 by ELIJAH HAVA*

**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 by Sarah*

**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 by Delilah*

**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 by shield*

**arithmetic mean**

what is the average of 88 94 98 84
*Thursday, April 18, 2013 by amy*

**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 by Jnr John*

**Please Help!! Math**

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 by Jnr John*

**please help me please!!! Math**

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 by Jnr John*

**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 by Anonymous*

**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 by mari*

**arithmetic**

play 160 games and won 60% how many games did the team win
*Sunday, April 14, 2013 by Hipolito*

**arithmetic**

which of the following is the leas0. 0.015 0.105 or 0.15
*Sunday, April 14, 2013 by Hipolito*

**arithmetic**

which of the following is the least
*Sunday, April 14, 2013 by Hipolito*

**algebra**

Select the first five terms in the arithmetic sequence an = 6n, starting with n = 1.
*Saturday, April 13, 2013 by Anonymous*

**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 by jessie*

**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 by Oian*

**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 by ayan*

**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 by Tifini*

**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 by Help Please!*

**Algebra please**

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 by Jess *

**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 by Jess *

**Algebra 3**

find the sum of each finite arithmetic series 8+9+10+...+15
*Wednesday, April 3, 2013 by Erica*

**arithmetic**

what is 6.3x100
*Wednesday, April 3, 2013 by Anonymous*

**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 by Jess *

**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 by Estrick Abel*

**arithmetic**

10.7 div by 315.00=
*Saturday, March 23, 2013 by Anonymous*

**algebra 2\arithmetic series**

on the moon ,afalling object falls jest 2.65feet in the first second afther
*Saturday, March 23, 2013 by maya*

**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 by cassie*

**maths**

What is the smallest positive common difference of a 6-term arithmetic progression consisting entirely of (positive) prime numbers?
*Thursday, March 21, 2013 by rohit*

**maths**

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 Details and assumptions Since 2 appears in A1 but not in A2, it does not appear in both of...
*Thursday, March 21, 2013 by rohit*

**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 by Cassie*

**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 by Cassie*

**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 by Peltier*

**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 by Peltier*

**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 by Peltier*

**7th Grade Math**

What is arithmetic and geometric sequences?
*Monday, March 18, 2013 by Jessie*

**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 by please..anyone help!!*

**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 by cebile*

**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 by Anonymous*

**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 by Firdous*

**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 by Sally*

**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 by ayan*

**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 by John*

**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 by jinie*

**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 by zandile*

**arithmetic**

the sum of two distinct numbers is 20,and their G.M is 6. find the numbers
*Wednesday, March 6, 2013 by ash*

**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 by dede*

**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 by drew*

**poetry**

What is the authors tone in the poem arithmetic?
*Monday, March 4, 2013 by miranda*

**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 by ken*

**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 by John*

**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 by John*

**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 by KIM*

**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 by Anonymous*

**math**

Find the arithmetic sequence if the fourth term is -6 and the eleventh term is -34
*Tuesday, February 19, 2013 by Lucia*

**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 by Isaac *

**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 by Brian*

**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 by Brian*

**math**

what formula use in solving or finding for the 9th term of a number in arithmetic series and sequences?
*Saturday, February 16, 2013 by luis*

**math**

what method i need to use in solving arithmetic and geometric sequences and series?
*Saturday, February 16, 2013 by luis*

**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 by nikki*

**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 by lee*

**maths**

what is a simple definition of consumer arithmetic for a 7th grader
*Tuesday, February 12, 2013 by cindy*

**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 by lee*

**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 by Dan*

**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 by please help me out!!! please*

**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 by John*

**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 by azmeerahim*

**arithmetic**

determine the secon termof an A.P whose sixth term is 12 and eighth term is 22?
*Saturday, February 9, 2013 by dany*