Friday

November 27, 2015
**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*

**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 by Oyediran*

**arithmetic**

What number is 7 more than another number their answer is 23 Find the numbers.
*Wednesday, February 6, 2013 by Adrianne*

**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 by Oscar*

**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 by Lucas*

**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 by Lucas*

**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 by Lucas*

**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 by Reiny*

**math**

be found arithmetic series 3a2-a6=-a2 a3+a4=19
*Tuesday, January 29, 2013 by doruntina*

**math**

3___,___,20 (arithmetic)
*Tuesday, January 29, 2013 by kiawanna*

**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 by Bethold*

**Math PLEASE**

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 by Aliza*

**Math PLEASE**

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 by Aliza*

**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 by Aliza*

**math**

The 6th term of an arithmetic sequence is x while the 11th is y find the 1st 2 terms
*Sunday, January 20, 2013 by unknown*

**math arithmetic order of operations**

(6.7 × 10-1) - (3.6 × 10-4
*Saturday, January 19, 2013 by Anonymous*

**Algebra**

Is the series 72, 48, 32,... an arithmetic or geometric series. WHat is common difference or ratio
*Thursday, January 17, 2013 by Andrew*

**arithmetic**

change 12/23 into a decimal to the nearest hundreth's
*Wednesday, January 16, 2013 by mark*

**arithmetic**

500 words / 8 minutes whats the unit rate
*Monday, January 14, 2013 by 1200k*

**arithmetic**

Using math to fine 9:20 am to 5:05 pm
*Monday, January 14, 2013 by Margie*

**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 by Crystal*

**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 by Crystal*

**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 by Riana*

**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 by Crystal*

**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 by Bishnu*

**math**

How will I know the equation of a sequence if it is not arithmetic nor geometric sequence?
*Saturday, January 5, 2013 by mae*

**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 by kazz*

**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 by Jm*

**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 by Riana*

**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 by Riana*

**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 by Riana*

**math**

t11=19 and t17=61.then what will be S12? arithmetic series question
*Tuesday, January 1, 2013 by Riana*

**maths-Arithmetic progression**

Prove that mean of squares of first n natural numbers is (n+1)(2n+1)/6
*Thursday, December 27, 2012 by Anonymous*

**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 by Anonymous*

**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 by Derrick*

**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 by Casey*

**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 by Derrick*

**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 by Aliza*

**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 by Anonymous*

**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 by simranpreet*

**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 by Chelsy*

**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 by Caitlin*

**arithmetic**

Write 8tenth with common fraction and decimal fraction
*Monday, November 19, 2012 by Anonymous*

**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 by Alice*

**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 by brianna*

**arithmetic**

does -9 + 2 equal 2 + (-9)?justify your answer.
*Wednesday, November 14, 2012 by jerry*

**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 by ahlana*

**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 by Anonymous*

**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 by Anonymous*

**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 by Yorgelys*