# 1)Find the sixth term of the geometric sequence for which a1=5 and r=3 A)1215 B)3645 C)9375 D)23 I chose A 2)Write an equation for the nth term of the geometric sequence -12,4,-4/3... A)aN=-12(1/3)n-1 B)aN=12(-1/3)n-1 C)aN=-12(-1/3)-n+1 D)aN=-12(-1/3)n-1 I chose C 3)Find

93,362 questions, page 12
1. ## Physics - Inelastic Collision ( check + help)

A billiard ball of mass 0.55kg moves with a velocity of 12.5m/s towards a stationary billiard ball of the identical mass and strikes it with a glancing blow. The first billiard ball moves of at an angle of 29.7deg clockwise from its original direction,

asked by Shaila on September 26, 2010
2. ## math

8,18,28,38,48 what is the next term? i came up with 10 am i correct? is this consider arithmetic or geometric?

asked by angela on November 26, 2014
3. ## TRIG

What is the 6th term of the geometric series with a1= -5 and r=2.5

asked by Alex on May 11, 2013
4. ## maths

The difference between the second and fourth terms of an arithmetic sequence is 3. If the product of the first and fourth term is 34, calculate the value of the first term.

asked by patric on August 13, 2014

The following problem refers to an arithmetic sequence. if a_8=9 and a_16=17, Find the term a_1, the common difference d, and then find a_30. a_n=a_1+(n-1)*d

asked by Keonn'a on October 2, 2018
6. ## math

write a variabe expression to describe the rule for each sequence. then find the 100th term. 100, 200,300,400.....

asked by Anonymous on February 22, 2010
7. ## AP Calculus

Find the first 4 terms and the 8th term of the recursively-defined sequence. b1 = 2 and bk+1 = 3bk, for k>0 A. 6, 18, 54, 162; 13,122 B. 3, 6, 9, 12; 24 C. 5, 8, 11, 14; 26 D. 6, 12, 24, 48; 768 E. 2, 6, 18, 54; 4374 F. 2, 4, 8, 16; 256 Thanks!

asked by Brock on July 10, 2012
8. ## math- Patterns... i tried it many times..HELP!!!!

1) The number times a dog barks is dependent on the number of passing cars. How many cars have passed when a dog barks 34 times? If 20 cars pass, how many times will the dog bark? Explain how you got to your answers? 2) The fourth term of a sequence is 4

asked by Susie ... HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! on September 16, 2008
9. ## Math

You are having a discussion about sequences with your classmate. She insists that the sequence 2,3,5,8,12 must be either arithmetic or geometric. Is she correct or incorrect? Explain.

asked by Taryn Hughey on October 7, 2015
10. ## Algebra

My teacher said I have this backwards, Here is the question: Formulate the recursive formula for the following geometric sequence. {-16, 4, -1, ...} And here is my answer: A(n+1) = A(n) * -1/4 An+1 = An * r is An+1 = An * (-1/4) Please correct it

asked by Britney on October 25, 2017
11. ## Math

7. You are having a discussion about sequences with your classmate. She insists that the sequence 2, 3, 5, 8, 12 must be either arithmetic or geometric. Is she correct or incorrect? Explain.

asked by Alex on April 17, 2015
12. ## Algebra

the following problem refers to a geometric sequence. If a_1=5 and r=3, find a_n. a_n=a_1 *r^n-1

asked by Keonn'a on September 26, 2018
13. ## algebra

You earned the following scores on five science tests: 75, 82, 90,84, and 71. You want to have an average score of at least 80 after you take the sixth test. a. Write and solve an inequality to find the possible schores that you can earn on your sixth test

asked by Tyler on March 7, 2012
14. ## math

1]find two possible values for the geometric mean of –1/4 and –4 [2]form a G.P that has two geometric means between (a)1029 and –3 (b) 2/k and 1/4k

asked by kel on February 20, 2017
15. ## Geometry-8th gr

The geometric mean x of two numbers is the positive value of x that satisfies the proportion a/x =x/b, where a and b are given. Find the geometric mean of 16 and 9.

asked by Mona on January 31, 2013
16. ## Math

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

asked by Tyler on February 9, 2016
17. ## math

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

asked by Toba on May 8, 2016
18. ## arithmetic

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

asked by gaya on March 8, 2016
19. ## Math

The nth term of an A.P. Is 3 times the 5th term.(a)find the relationship between a and d.(b)prove that the 8th term is 5times the 4th term.

asked by Miracle on January 29, 2014
20. ## Math

the thirteenth term of an arythmeticprogression is 27. given that the seventh term equals to three times the second term, find: the first term nd the common difference of the progression

asked by Brian on April 12, 2017
21. ## mathematic

determine the arithmetic sequence that has the seventh term equal to 3 and the twelfth term equal to -3

asked by thulani on March 19, 2015
22. ## Math

For the sequence, describe the pattern, write the next term, and write a rule for the nth term. 2/3,4/4,6/5,8/6,...

asked by Pedro on March 1, 2011
23. ## algebra

The fifth term of an A.P exceeds twice the second term by 1.The tenth term exceeds twice the fourth term by 3. Find:1.the first term. 2.the common difference. 3.the sum of first twenty five terms.

asked by Raj on July 5, 2017
24. ## algbebra

The fifth term of an A.p. Exceeds the second term by 1.The tenth term exceeds twice the fourth term by 3 * find first term and common difference * sum of first twenty-five terms.

asked by Anwar on October 24, 2016
25. ## math

patterns with fractions write a rule for the sequence.then,find the unknown number how do you do this?ill give you an example...1/2, 2/3, 1, 1 1/6.it says,think:the pattern is increasing.add 1/6 to find the next term.here is a problem.... 1 3/8, 1 3/4, 2

asked by maria on March 24, 2014
26. ## Arithmetic Progression

In an AP the 6th term is half the 4th term and the 3rd term is 15. a. Find the fist term and the common difference. b. How many times are needed to give a sum that is less than 65?

asked by Math on September 17, 2012
27. ## Math

8. Isabel found three pieces of cable in her tool drawer. Here are their lengths (in meters). 10.43 ,13.2 ,9 What is the total length of the three pieces? 9. Lashonda needs to drive 20 miles to work. So far, she has driven 2.6 miles. How many more miles

asked by Kiki Wilson on May 2, 2012
28. ## Math

The sum of the first seventeen terms of an arithmetic series is 493 The third term is 11. Find the first term and the seventeenth term. The n-th term is 3*n + 2

asked by Blonde Glamour on December 21, 2006
29. ## math

in an AP the 10th term is 54 and 5th term is 4 times the 2nd term . Find the 1st term 'a' and common difference 'd'

asked by jomon on February 3, 2014
30. ## MATH

THE 14TH TERM OF AP IS 96 WHILE THE 25TH TERM IS 173 FIND THE A.19TH TERM B.SUM OF 13TH AND 56TH TERM

asked by ORJINTA on August 24, 2016
31. ## Further maths

The first term of an AP is equal to thrice the common difference. What is the sixth term of the AP,if the common difference is 8

asked by Emmanuel on April 19, 2016
32. ## math 100

The mean defined in the text is sometimes called the arithmetic mean to distinguish it from other possible means. For example, a different mean, called the geometric mean (G.M.), is used in business and economics for finding average rates of change,

asked by ryan on November 4, 2018
33. ## Precal.

If object is thrown upward with an intitial velocity of 15 ft per second, then its height is given by h=-15t^2 + 60t. What is the maximum height? Two ways to find it. 1) AT the top, max height, will be one half of the time it would come back down and hit

asked by trellis on June 5, 2007
34. ## algebra

1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

asked by Marissa on August 26, 2007
35. ## algebra(check)

1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

asked by Marissa on August 24, 2007
36. ## algebra

1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

asked by Marissa on August 24, 2007
37. ## algebra

1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

asked by Marissa on August 23, 2007
38. ## Sequence

What is the fifth term of the sequence a sub n = 1/3^n? a)1/12 b)1/81 c)1/243 d)1/15 If the sequence starts at n = 1 (there is no reason why it should) then it is 1/243

asked by raven 31791 on March 8, 2007
39. ## maths

The 12th term of exceeds the 3rd term by 36 of an a.p If it's 16th term is 64 find first term and common difference

asked by hetal on April 10, 2016
40. ## maths

the first term of an arithmetic progression is-4 and 15th term is double the 5th term. find the 12th term.

asked by cliff on August 17, 2018
41. ## Precalc

Find a formula for the nth term if... a)the 8th term is 8 and the 20th term is 44 b) the 8th term is 4 and the 18th term is -96 thanks!! I am just confused how you do this if you don't know what n is.

asked by Rebekah on May 12, 2013
42. ## math sequenc

the nth term of the geometric progression is 3(2^n-1). how many terms are less than 200?

asked by HELP HELP MNHS on January 8, 2013
43. ## Math

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

asked by No one special on March 20, 2016

Of the sixth-grade students surveyed, 12% bring their lunches to school. Suppose 24 sixth-graders do this? How many sixth-grade are at the school?

asked by Anonymous on December 1, 2010
45. ## math

of the sixth grade students surveyed,12% bring their lunchs to school. suppose 24 sixth graders do this.how many sixth graders are at the school

asked by Breire on September 9, 2009
46. ## MATH

PLEASE EXPLAIN HOW TO FIND THE COMMON RATIO FOR THE GEOMETRIC SEQUENCE 16, 40. 100,____, ____ AND 81,54, ______,______,______

asked by SHERYL on March 31, 2011
47. ## Precalculus

Find each of the sums indicated or described. Show use of the appropriate formula, rather than simply using a calculator to add them. 1) The sum of the first 17 terms of a geometric series with a first term of 3000 and a common ratio of 1/2. 2)

asked by Y on November 11, 2015
48. ## algebra

Can someone please help me with this problem? Thanks! Evaluate the infinite geometric series: 8+4+2+1+... I thought you needed to know the number of terms to evaluate, but how do you know them if it is infinite? The limit of Sn = 1 + r + r^2 + r^3 + r^4 +

asked by Mercy on May 30, 2007
49. ## Algebra 2

Need help on the #13-20. 13. What is the quotient of d − 2 ) d 4 − 6d 3 + d + 17 __________________ ? A. d 3 − 4d 2 − 8d − 15 R −13 B. d 3 − 8d 2 + 16d − 31 R 79 C. d 3 − 4d 2 + 9d + 35 D. d 3 − 8d 2 + 17d − 17 14. What is the sum of

asked by Emily on December 6, 2010
50. ## math

The 4th term of an AP is 3 times its first term and the 7 term exceeds the 3 term by 1.Find the 10 term of an AP.

asked by Habooba on December 8, 2011
51. ## math

the second term of AP is 15 and the fifth term is 21.find (1) the common difference and the first term (2) The eight term (3) The sum of the first 16 term

asked by hussein jongo on November 16, 2016

1.write the first four terms of the sequence that begins with 2000 and has the common ratio 1.05. 2.write the first four terms of the sequence that begins with 5000 and decays 15% with each term.what is the common ratio? 3.write a recursive formula for the

asked by britney on October 8, 2012
53. ## Maths

The 14th term of an Ap is double the 4th term.find the 10th term if the 2nd term is 8

asked by Hacker on October 2, 2013
54. ## Ap series

Sum of first six term of an ap is 46 ratio of its 10th term to that of 30th term is 1:3. Find its 13th term

asked by Math on August 2, 2016
55. ## Mathematics

If the 8th term of an AP is 36 and the 16th term is 68. Find: a) the first term b) the common difference c) The 20th term

asked by Bex John on September 11, 2016
56. ## biology

DNA codes for mRNA, which is then translated into polypeptides,which are strands of amino acids. The DNA sequence below codes for the following amino acids: methionine-valine-glycine-alanine-alanine-serine TAC CAA CCA CGC CGC UCA What effect would the

asked by stacey on December 31, 2007
57. ## math

Gino just opened a pizza restaurant. He had 1 customer the first day, 3 the second day, 6 the third day, and 10 the fourth day. a. If this pattern continues, how many customers should gino expect on the seventh day? Day 10? Show the data table (for rate of

asked by unknown on October 12, 2011
58. ## math

The second and fifth terms of a geometric progressions are 16 and 2 respectively. Determine the common ratio and the first term

asked by kudu on February 3, 2015
59. ## algebra

What number must be added to each of the numbers 0, 8, and 32 so that they form consecutive terms of a geometric sequence? I don't understand what the question is asking first of all. The answer is 4. Help is much appreciated.

asked by jason on November 28, 2011
60. ## Further mathematics

An exponential sequence of positive terms and a linear sequence have the same first term.the sum of their first terms is 3 the sum of their second terms is 3/2,and the sum of their third terms is 6.find their fifth terms.

asked by Tosin on November 20, 2011
61. ## Math

The first prize in a lottery is \$250 000. Each winner chosen after the first is paid 20% as much as the winner before them. b) Determine an explicit formula for the general term. (2 marks) c) Determine a formula for the sum of n terms of the geometric

asked by Alex on September 18, 2014
62. ## Algebra

Find the 20th term of the following sequence. -6, -4, -2, 0, ... 32 44 46 I did the math but I don't know if it's correct, I'm not very good in math.

asked by isaac clarke on October 16, 2014
63. ## algebta 2

To find the nth term of an arithmetic sequence the formula given is a(sub n) = a (sub 1) + (n-1)d. Why is (n-1) a part of the formula? Why isn't just n?

asked by Kevin on April 27, 2010
64. ## algebra

Write a recursive formula for the sequence formula 15,26,48,92,180,.. then find the next term. can someone please help me

asked by lee on February 5, 2013
65. ## maths sequence

if the sequence is 2,15,52,125,246.... find the nth term expression and sum of the nth terms

asked by Anonymous on October 15, 2016
66. ## maths-sequence need help

if the sequence is 2,15,52,125,246.... find the nth term expression and sum of the nth terms

asked by Anonymous on October 15, 2016
67. ## math 140

Use differences to find a pattern in the sequence. 1,1,11,36,81,151,251 Assuming the pattern continues, the eight term should be.

asked by betsy on April 4, 2013
68. ## Algebra 2

Find the sum of the first 12 terms of this sequence: 9,4.5,2.25,... I believe that the pattern is dividing the term by 2,and I keep getting 7.9956 for the sum, but that is incorrect. Anyone understand this?

asked by Nan on August 7, 2014
69. ## Algebra

Find the first five terms of the sequence whose nth term is given. a: (-2)n + 2n b: n squared(-1)n c: |10-n squared|

asked by Rose on October 1, 2014
70. ## math

A class conducts a survey of 1000 students. Of the sixth-grade students surveyed, 12% bring their lunches to school. Suppose 24 sixth-graders do this. How many sixth-graders are at the school?

asked by kim on September 7, 2011
71. ## Maths

A super-Fibonacci sequence is a list of whole numbers with the property that, from the third term onwards, every term is the sum of all the previous terms. For example, 1, 4, 5, 10, ... How many super-Fibonacci sequences with 1 involve the number 2016? A.1

asked by Palmer on November 16, 2016
72. ## Algebra 2

What is the first term of a geometric series with a summation of 800, 4 terms and a common ratio of 3?

asked by Greg on April 12, 2012
73. ## math(geometric series)

the common ratio of the infinite geometric series whose 2nd term is 3/2 and its sum is 8?

asked by happy new year :) on December 31, 2016
74. ## math

What is the smallest integer that can possibly be the sum of an infinite geometric series whose first term is 9?

asked by Speedo on September 9, 2013
75. ## Algebra 2

What is the first term of a geometric series with a summation of 800, 4 terms and a common ratio of 3?

asked by Greg on April 11, 2012
76. ## math

What is the smallest integer that can possibly be the sum of an infinite geometric series whose first term is 9?

asked by Speedo on September 12, 2013
77. ## MATH

What is the smallest integer that can possibly be the sum of an infinite geometric series whose first term is 9?

asked by Speedo on September 15, 2013
78. ## Maths

The second term of a GP is12 more than the first term,given that the common ratio is half of the first term.Find the third term of the GP?

asked by Ifeanyi on August 6, 2018
79. ## Math

The first term of GP is - 3 and square of second term is equal to the 4th term.Find 7th term

asked by Richa Singh on September 11, 2018
80. ## Mathematics

The second term of a G.P is 12 more than the first term,given that the common ratio is half of the first term.find the fourt term of the G.P.

asked by Elom Charles on February 17, 2012
81. ## geometric progression

3. The 5th term of an AP is 8 and the 10th term is -7, find the 20th term and 50th term of an AP.

asked by Achire on July 19, 2017
82. ## Math

A G.p is such that the 3rd term is 9 times the first term, while the second term is 124 of the fifth. Find the fourth term

asked by Kingsley on May 24, 2014
83. ## math

The third term of a Gp is 54 & 7th term is reciprocal of 3rd term find the 5th term

asked by neetu on May 14, 2017
84. ## Math

Find the specified term of the expansion in each of the following: a.6th term of (3x + y)^9 b.Middle term of (3x+y^3)^8 c.The term in (x + 2y)^10 that involves x^7

asked by Brianne on November 2, 2014
85. ## Math

The third term of an A.P is 20, the fourteenth term is 64. Find the first term, the common difference and the nth term

asked by Angeles on January 29, 2017
86. ## Arithmetic Progressions

The second term of an arithmetic progression I four times the fits term, and the first term is ten. Find the common difference and hence find the sum of the first 12 terms.

asked by Steph on March 10, 2015
87. ## Sequences

Like the Fibonacci sequence, a certain sequence satisfies the recurrence relation an=an−1+an−2. Unlike the Fibonacci sequence, however, the first two terms are a1=4 and a2=1. Find a32.

asked by Daniel on February 9, 2018
88. ## Math

The 3rd and 9th term of a g.p are 54 and 39,336 respectively.find the 6th term,sum of 4th term,sum of 4th and 7th term and product of 2nd and 5th term

asked by daniel on October 30, 2018
89. ## algebra

Find the common difference or ratio in each sequence. Write an algebraic expression for the sequence and find the next three terms. 6. 160, 40, 10, 2.5... 8. -1, 2, -4, 8.... Can you help me find the answers?

asked by nonononono on June 5, 2014
90. ## Find the common difference or ratio in each..?

Find the common difference or ratio in each sequence. Write an algebraic expression for the sequence and find the next three terms. 6. 160, 40, 10, 2.5... 8. -1, 2, -4, 8.... Can you help me find the answers?

asked by nonononono on June 5, 2014
91. ## 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

asked by Queta on September 14, 2013
92. ## maths

in GP the product of the Second term and fifth term is double the firth term. find the first term if the sum is first terms is 80 show that r^3+r^2+r+1=40 b. hence find the value of r c.show that the value of the sum of the nth term is 3^n-1

asked by simanga on October 10, 2018
93. ## math!

determine two geometreic sequences whose first terms are 18x-9, 2x+8 and x-1 how would I go about and do this question? I have no idea! so a little help would be really helpful! thanks! A geometric sequence looks like a, ar, ar2, ar3, ..., arn, ... where a

asked by Anonymous on October 18, 2006
94. ## Algebra 2

What is the sum of a geometric series with first term a1= 2, a common ratio r of 2 and the number of terms, n, equal to 4.

asked by Embraced on January 21, 2012
95. ## math

calculate the infinite sum of a geometric series with first term 15,000 and common ratio by (1-1/10)

asked by john on December 6, 2010
96. ## math

P is the product ,n is the consecutive term of geometric progression, s is tje sum of their reciprocal then(S/R)n is equal a) p b) p2 c) p3 d) pn

asked by mayuri shelke on September 30, 2014
97. ## Sequences...again

Sequence T1 is obtained by adding the corresponding terms of S(sub) and S(sub2). so that T(sub1) = {2.6, 3.39, 4.297, 5.3561, . . .}. We shall write T(sub1) = S(sub1) + S(sub2) to convey the addition of S(sub1) and S(sub2) in this way. Is T(sub1) an

asked by Nelson on September 30, 2007
98. ## algebra

``if Tn =2- 3 which term of sequence is. (a) - 43 (b) - 82 (c) 91''.

asked by Habu on January 23, 2016
99. ## math

in the sequence 0.07,0.12,0.17,... what term has a value of 1.67?

asked by kevin on June 24, 2018
100. ## Math

What is the next term in the sequence 81, 27, 3, 1, 1/3...

asked by Jack on November 29, 2017