Thursday

June 30, 2016
**math**

Find the number of term s in the following arithmetic sequence. 3, 9, 15, 21... 123
*Saturday, April 19, 2014 by Anonymous*

**arithmetic**

a car traveled a distance of 195 miles in 3 hours 15 minutes what is the unit rate ? oris it answer 60 miles per hour
*Saturday, April 19, 2014 by jane *

**math**

identify the sequence 1.6, .8, .4, .2 as arithmetic, geometric, or neither and why.
*Sunday, April 13, 2014 by steve*

**algebra 2**

what is the sum of the first 11 terms of the arithmetic series in which asub one = -12 and d=5
*Sunday, April 6, 2014 by kathy*

**arithmetic**

Ana sees a computer that costs $1600. The store manager says next week will be on sale $350 less. What percent will Ana save
*Wednesday, April 2, 2014 by Anonymous*

**PRE CALC**

The 20th term of an arithmetic sequence is 27 and the first term is -11. What is the common difference??
*Wednesday, April 2, 2014 by Aly*

**arithmetic**

Select the first five terms in the arithmetic sequence an = 4n, starting with n = 1.
*Tuesday, April 1, 2014 by Anonymous*

**Statistics**

For the most recent seven years, the U.S. Department of Education reported the following number of bachelor's degrees awarded in computer science: 4,253; 5,578; 6,406; 7,334; 8,728; 11,298; 15,182. What is the annual arithmetic mean number of degrees awarded? About 9,120 ...
*Thursday, March 27, 2014 by Shawn*

**Statistics**

For the most recent seven years, the U.S. Department of Education reported the following number of bachelor's degrees awarded in computer science: 4,253; 5,578; 6,406; 7,334; 8,728; 11,298; 15,182. What is the annual arithmetic mean number of degrees awarded? About 9,120 ...
*Thursday, March 27, 2014 by Shawn*

**Statistics**

A stockbroker placed the following order for a customer: • 50 shares of Kaiser Aluminum preferred at $100 a share • 100 shares of GTE preferred at $27.20 a share • 20 shares of Boston Edison preferred at $12.20 a share What is the weighted arithmetic mean price ...
*Thursday, March 27, 2014 by Shawn*

**Statistics**

The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 11.0 inches, and the standard deviation is 2.0 inches. About 68 percent of the outside diameters lie between what two amounts? 8....
*Thursday, March 27, 2014 by Shawn*

**Economics and Statistics**

A stockbroker placed the following order for a customer: • 50 shares of Kaiser Aluminum preferred at $100 a share • 100 shares of GTE preferred at $27.20 a share • 20 shares of Boston Edison preferred at $12.20 a share What is the weighted arithmetic mean price ...
*Thursday, March 27, 2014 by Anonymous *

**Calculus**

Posted by MG on Wednesday, March 26, 2014 at 6:54pm. The hands of a clock in some tower are 4.5m and 2m in length. How fast is the distance between the tips of the hands changing at 9:00? (Hint: Use the law of cosines) The distance between the tips of the hands is changing at ...
*Thursday, March 27, 2014 by MG*

**Maths**

4x+1,2x+4 and x+3 are first three terms of arithmetic sequence determine the value of x
*Wednesday, March 26, 2014 by Khahliso*

**Business & Economics**

For the most recent seven years, the U.S. Department of Education reported the following number of bachelor's degrees awarded in computer science: 4,033; 5,652; 6,407; 7,201; 8,719; 11,154; 15,121. What is the annual arithmetic mean number of degrees awarded? About 12,240 ...
*Monday, March 24, 2014 by Student5*

**arithmetic**

An investment of $2,000 is earning interest at the rate of 6.2% compounded quarterly over 5 years. Approximately how much interest is earned on the investment?
*Friday, March 21, 2014 by tiffany roberts*

**Algebra ll**

Help please, I don't understand how to do this... Give an example of an arithmetic sequence that is found in the real world. Find the common difference and write a recursive and iterative rule for the sequence. Use one of the rules to find another term of the sequence. ...
*Wednesday, March 19, 2014 by Me and I*

**arithmetic**

if you 99 lines on a piece of paper so that no two lines are pallarel to each other and no three lines pass through the same point,how many times will they will intersect?
*Sunday, March 9, 2014 by mashita kagiso*

**mathematics **

MATHEMATICS PLEASE HELP ME!!! In an arithmetic series the 3rd term is twice the 8th term find the first 25 terms
*Thursday, March 6, 2014 by brad johnson*

**math**

In an arithmetic series the 3rd term is twice the 8th term. Find the sum of the first 25 terms.
*Thursday, March 6, 2014 by simamkele libalele*

**mathematis**

consider the arithmetic sequence:-4;-1;2;5...if the nth term of the sequence is 74 determine the value of n
*Wednesday, March 5, 2014 by mmatshepho*

**arithmetic**

The ratio of the sum of the first 8 terms of a G.P. to the sum of the first 4 terms of the same G.P. is 97:81, where the common ratio of the G.P. is a real number. What is the common ratio?
*Sunday, March 2, 2014 by priya*

**Math.G.P**

The 1st term of a G.P is equal to x-2,the 3rd term is x+6 and the arithmetic mean of the 1st and 3rd terms stands in the ratio to the 2nd 5:3.find the value of x.
*Friday, February 14, 2014 by Miracle*

**math**

Select the first five terms in the arithmetic sequence an = 8n, starting with n = 1
*Saturday, February 8, 2014 by lee*

**math**

the fourth term of an arithmetic progression is equal to 3 times the first term and the seventh term exceeds twice the third term by 1 find the first term and the common differrence
*Friday, February 7, 2014 by kruthi*

**Math**

The sum of the first n terms of an arithmetic series is given by: Sn=5/2n^2 + 7/2n. Determine: 3.2.1 The common difference. 3.2.2 The tenth term
*Sunday, February 2, 2014 by Apiwe*

**math**

find the 4th term of an arithmetic sequence whose first term is -8 and whose 9th term is 32.
*Thursday, January 30, 2014 by breauna*

**Maths **

if the 29th term of arithmetic series is double of 19th term then find the 9th term.
*Thursday, January 30, 2014 by Arpan*

**Algebra 1**

Tell whether the sequence is arithmetic. If it is, what is the common difference? -12, -7, -2, 3,… (1 point)
*Monday, January 27, 2014 by Gabby*

**Math**

Two terms of an arithmetic sequence are t6=-3 and t11=-13. What is t20?
*Saturday, January 18, 2014 by Sandara*

**calculus**

i need to find the derivative using chain rule: (x^2 + 2x - 6)^2 (1-x^3)^2 i got the answer from a site but the problem is i cannot get my work to match up with the answer, i dont know what im doing wrong. answer: 10x^9 + 36x^8 − 64x^7 − 182x^6 + 168x^5 + 80x^4 + ...
*Monday, January 13, 2014 by eric*

**arithmetic sequences**

a new car cost $13,000 and is depreciating by $900 each year. how much will the car cost be worth after 4 years?
*Thursday, January 9, 2014 by alexis*

**arithmetic sequences**

a tube containing 3 ounces of toothpaste is being used at at rate of 0.15 ounces per day. how much toothpaste will be in the tube after one week?
*Thursday, January 9, 2014 by alexis*

**arithmetic sequences**

jessie is playing an arcade game that costs 50cents for the first game and 25cents to continue if she loses. how much will she spend on the game if she continues 9 times?
*Thursday, January 9, 2014 by alexis*

**Maths**

If 9th term of an arithmetic progression is 0, prove that its 29th term is double the 19th term.
*Thursday, January 9, 2014 by Anonymous*

**Math**

Tell whether each sequence is arithmetic. Justify your answer. If the sequence is arithmetic, write a function rule to represent it. 15. 128, 64, 32, 16... 16. 3, 3.25, 3.5, 3.75..
*Wednesday, January 8, 2014 by Macie*

**math**

A friend opens a savings account by depositing $1000. He deposits an additional $75 into the account each month. a. What is a rule that represents the amount of money in the account as an arithmetic sequence? b. How much money is in the account after 18 months? Show your work.
*Wednesday, January 8, 2014 by Shakira*

**math**

A friend opens a savings account by depositing $1000. He deposits an additional $75 into the account each month. a. What is a rule that represents the amount of money in the account as an arithmetic sequence? b. How much money is in the account after 18 months? Show your work.
*Wednesday, January 8, 2014 by Shakira*

**Math**

A friend opens a savings account by depositing $1000. He deposits an additional $75 into the account each month. a. What is a rule that represents the amount of money in the account as an arithmetic sequence? b. How much money is in the account after 18 months? Show your work.
*Wednesday, January 8, 2014 by Shakira*

**math**

i need help on properties of arithmetic
*Wednesday, January 8, 2014 by jessica*

**algebra **

the third term of an arithmetic sequence is 14 and the ninth term is -1. Find the first four terms of the sequence
*Tuesday, December 17, 2013 by Anonymous*

**Mathematics**

The 25 term of an Arithmetic Progression is 7 1/2 and the sum of the first 23 terms is 98 1/2. Find the i. 1st term ii. common difference iii. sum of the first 30 terms
*Wednesday, December 11, 2013 by Jamiu*

**Precal**

Find x such that -8 x - 3, 3 x - 1, and 2 x + 49 are consecutive terms of an arithmetic sequence. x=?
*Friday, November 29, 2013 by Teagan*

**Math**

Tell whether the sequence is arithmetic. If it is, write a function rule to represent it. 0.2, -0.6, -1.4, -2.2 This is an arithmetic sequence, but I do not understand the function rule of A(n) = 0.2 - 0.8(n-1), which is the given answer.
*Sunday, November 17, 2013 by Anonymous*

**Math help please**

1. Each time a touchdown is scored in a football game, 6 points are added to the score of the scoring team. A team already has 12 points. What rule represents the number of points as an arithmetic sequence when n is the number of touchdowns scored? A(n) = 12 + 6n A(n)12 - (n...
*Thursday, November 14, 2013 by Charlotte*

**math**

What is the 32nd term of the arithmetic sequence where a1 = -32 and a9 = -120?
*Friday, November 8, 2013 by Anonymous*

**physics**

Suppose a ball of putty moving horizontally with 1kg.m/s of momentum collides and sticks to an identical ball of puffy moving vertically with 1 kg.m/s of momentum. Why is their combined momentum not simply the arithmetic sum, 2 kg.m/s?
*Friday, November 8, 2013 by Anonymous*

**Math-Trigonometry**

Show that if x, y, and z are consecutive terms of an arithmetic sequence, and tan y is defined, then (sin x + sin y + sin z) / (cos x + cos y + cos z) = tan y. So I tried letting x = y-k (since x,y,z are consecutive terms of an arithmetic sequence), then z= y+k So we get (sin(...
*Thursday, November 7, 2013 by Sam*

**math**

Find the 7th term of arithmetic progression...12,20,28.
*Monday, October 28, 2013 by sirvic*

**arithmetic**

If 48 marbles are to be divided between Bill and Carl in the ration 3:5, how many marbles will Bill get?
*Friday, October 25, 2013 by milton*

**math**

The terms 4x + 36, 2x - 6, and 3x - 27 are consecutive terms in an arithmetic sequence. What is the value of x ?
*Friday, October 25, 2013 by amira*

**arithmetic**

round .44857 to the nearest hundreths?
*Friday, October 25, 2013 by donny*

**arithmetic**

5. Assume that if students buy more than $250 of art supplies in one visit, they may put the charge on a student account with terms of 2/10 EOM. If a student makes the purchase on September 16, on what day does the 2% discount expire? If the purchase is made on September 26, ...
*Sunday, October 20, 2013 by Anonymous*

**Geometry **

Please answer at least one . PLEASE 1. Triangle XYZ has a right angle at Y. V,W are on XZ such that XV=XY. WZ=YZ, find ANGLE VYW . 2. STUVWXYZ is a regular octagon. Find SW/ TZ. 3. The interior angles of a convex polygon form an arithmetic progression with a common difference ...
*Saturday, October 19, 2013 by Jayden*

**arithmetic**

How do you solve this for h? A=1/2(b1 plus b2)?
*Tuesday, October 8, 2013 by Reed*

**Math**

how many terms of the arithmetic sequence -5,-1,3,… must be added to reach the sum of 400
*Monday, October 7, 2013 by Pre-Cal*

**arithmetic**

2+15/3*5=
*Sunday, October 6, 2013 by mike*

**math**

the arithmetic series 1 + 4 + 7 + ....tn has a sum of 1001. how many terms does the series have?
*Thursday, October 3, 2013 by buffy*

**math **

x, y, 3y If the average (arithmetic mean) of the 3 numbers above is 3x and x≠0, What is y in terms of x?
*Saturday, September 28, 2013 by Anonymous*

**math **

x, y, 3y If the average (arithmetic mean) of the 3 numbers above is 3x and x≠0, What is y in terms of x?
*Saturday, September 28, 2013 by mike*

**algebra 1**

Tell whether the sequence is arithmetic. If the sequence is arithmetic, write a function rule to represent it. 12, –9, 6, –3, ...
*Tuesday, September 24, 2013 by bobby*

**algebra**

I need to find the first five terms in the arithmetic sequence in an =(2)^n-1 n=1 I don't know now to type the n's smaller.
*Saturday, September 21, 2013 by Alaska Diamond*

**arithmetic**

28,000 X .05% compounded for 33 years =
*Thursday, September 19, 2013 by tom*

**arithmetic**

If I WALK FROM MARKER 8.8 MILE TO MARKER 11.8 MILE HOW FAR IS THAT?
*Sunday, September 15, 2013 by Carlos*

**Math**

Alpha writes the infinite arithmetic sequence 10, 8, 6, 4, 2, 0... Beta writes the infinite geometric sequence 9, 6, 4, 8/3, 16/9,... Gamma makes a sequence whose n^th term is the product of the n^th term of Alpha's sequence and the n^th term of Beta's sequence: 10*9,8...
*Sunday, September 15, 2013 by Speedo*

**Math**

1. Select the first five terms in the arithmetic sequence an= 2 n , starting with n =1 A. ( 1 / 2 , 1/4 ,1/6, 1/8, 1/10) B. ( 1 , 2 , 3 , 4 , 5 ) C. ( 3 , 4 , 5 , 6, 7 ) D. ( 2 , 4, 6 , 8, 10 ) My answer is D. 2. Select the first five terms in the geometric sequence an = ( 2...
*Saturday, September 14, 2013 by Queta*

**Math - Averages**

Six dogs have an average(arithmetic mean) weight of 55 pounds. If the heaviest dog weighs 100 pounds, the lightest dog weighs 5 pounds, and the second-lightest dog weighs 30 pounds, what is the average weight of the other 3 dogs in pounds?
*Friday, September 13, 2013 by Venus*

**Math - Averages**

The test average for Louis' calculus class is found by taking the arithmetic mean of his four best test scores. If his first four test scores are 65,82,76 and 87, what score must he get on the fifth test to raise his test average to an 85?
*Friday, September 13, 2013 by Venus*

**MaTh**

Let a_1, a_2, . . . , a_10 be an arithmetic sequence. If a_1 + a_3 + a_5 + a_7 + a_9 = 17 and a_2 + a_4 + a_6 + a_8 + a_{10} = 15, then find a_1.
*Monday, September 2, 2013 by Speedo*

**arithmetic**

after 12 years, ria will be 3 times as old as she was 4 years ago. find her present age.
*Tuesday, August 27, 2013 by nishu*

**mathematics**

the arithmetic mean of x,y and z is 6 while that of x,y,z,t,u,v and w is w. Calculate the arithmetic mean of t,u,v and w.
*Saturday, August 24, 2013 by lawrence*

**math**

the arithmetic mean of x,y and z is 6 while that of x,y,z,t,u,v and w is 9. Calculate the erithmetic mean of t, u, v and w
*Saturday, August 24, 2013 by lawrence*

**arithmetic**

7.86x 4.6=
*Monday, August 12, 2013 by stacey*

**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*