Questions on Algebra: Sequences of numbers, series and how to sum them answered by real tutors!

Tutors Answer Your Questions about Sequences-and-series (FREE)

Question 835412: What is the next number in the sequence?
1 , 4 , 9 , 61 , 52 , 63 , 94 , 46 , 18 , 1 , 121 ...

Click here to see answer by Edwin McCravy(20056)

Question 835735: what is 3 plus 1 over 7 ??
Click here to see answer by jim_thompson5910(35256)

Question 835763: 1/5(15x-25)-1/3(18x-8y)
Click here to see answer by Fombitz(32388)

Question 835770: I have been trying to figure out what the missing number is in 81 _ 91? I have tried all different types of methods and the answers I'm not to sure of. Please help
Click here to see answer by richard1234(7193)

Question 836129: I need to know the next number in the sequence and why for the following two please
38 19 32 26 26 33 20
and
41 25 39 27 36 30 32

Help
Iain
Click here to see answer by gsmani_iyer(201)

Question 836129: I need to know the next number in the sequence and why for the following two please
38 19 32 26 26 33 20
and
41 25 39 27 36 30 32

Help
Iain
Click here to see answer by Edwin McCravy(20056)

Question 836122: what is the probability of getting 100 heads in 100 tosses of a coin ...
Click here to see answer by Alan3354(69443)

Question 836176: Find the missing terms in each sequence. 24 26 30 38 54
Click here to see answer by josgarithmetic(39618)

Question 836284: 26/45-6/35=?/315
Click here to see answer by jim_thompson5910(35256)

Question 836133: (4/1.2.3)+(5/2.3.4)+(6/3.4.5)+.......
find the sum up to nth term.
Click here to see answer by Edwin McCravy(20056)

Question 836400: This is one of the questions in a test that I wasn't able to answer.
In the geometric sequence, a-sub1 = 1 and a-sub4 = 27, find a-sub7.
A. 2992
B. 1953
C. 2187
D. 2110

Thanks,
Shayne
Click here to see answer by Alan3354(69443)

Question 836433: What would the algebraic expression be for these problems because i can't figure it out?
1. term number : 1 3 5 7
term value: 9 15 21 27
2. term number: 1 2 3 4 5 6 7 8
term value: 12 14 16 18 20 22 24 26
Click here to see answer by rothauserc(4718)

Question 836498: Which expression describes the series 12,10,8,6, ... ?
Click here to see answer by richard1234(7193)

Question 836688: proove that 4 added to the sum of consecutive terms of A P 21,39,5,... gives perfect square.
Click here to see answer by richard1234(7193)

Question 836732: the sum and difrence of two numbers are 32 and 16 respectively. find the numbers?

Click here to see answer by drpipespropmzy(2)

Question 836844: I have tried for a long time to figure out, what the following numbers are:
2 5 19 x y
Anyone who can give me a hint?
Tine
Denmark
Click here to see answer by Alan3354(69443)

Question 836844: I have tried for a long time to figure out, what the following numbers are:
2 5 19 x y
Anyone who can give me a hint?
Tine
Denmark
Click here to see answer by Edwin McCravy(20056)

Question 836842: Determine whether the sequence below is a geometric sequence and, if so, find a formula that describes the sequence.
1, 2, 3, 4, 5, ...

Click here to see answer by thejackal(72)

Question 836815: work out the value of the series
1+2+4+5+7+8+10+11+......+50
Click here to see answer by richard1234(7193)

Question 836939: whats the sum of 1/4 and 1/9
Click here to see answer by richwmiller(17219)

Question 837300: I have this sum:
1 + 4 + 12 + 32 + ... + 2^(n-1)*n
I haven't done calculus in a while so I can't remember how to do it
( 2^(n-1)*n = 2 to the power of (n-1), everything times n )
Cheers
Click here to see answer by richard1234(7193)

Question 837405: the product and sum of 30 and 11
Click here to see answer by Fombitz(32388)

Question 837671: I'm Stuck On This Question
1,-3,9,-27,81
I Need To Describe The Sequence And Need To Fixure Out The Next 3 Terms
Click here to see answer by josgarithmetic(39618)

Question 837758: The sum of four consecutive prime numbers is 48. What is the smallest of these numbers?
Click here to see answer by richard1234(7193)

Question 837859: Evaluate the expression for x = �3.
A.
�18
B.
�16
C.
0
D.
6

Please select the best answer from the choices provided

A
B
C
D

Click here to see answer by richard1234(7193)

Question 837854: find the missing terms in each sequence below?
5 6 7 9 12 17 25 and 38
Click here to see answer by richard1234(7193)

Question 837876: cookies are sold in packages of 1,2,5,12. with this packaging ,HOW MANY WAYS CAN YOU package a dozen cookies . for full credit your answer should include the total number of ways and a list of all the possible combinations. Express your answer in a complete sentence
Click here to see answer by richard1234(7193)

Question 838144: determine the arithmetic series given S4 = 26 s5= 42 and s6 = 57
Click here to see answer by mananth(16946)

Question 838315: On a map with a scale of 1:24,000, a measured distance of 1 inch represents an actual distance of???? Please answer in feet.
Click here to see answer by ewatrrr(24785)

Question 838253: solve the nth term for the following sequence 1,7,29,51,57

Click here to see answer by Edwin McCravy(20056)

Question 838572: The first term of an AP is 6 and the fifth term is 12. The progression has n terms and the sum of all the terms is 90.
What is the value of n? (how many terms)
Click here to see answer by mananth(16946)

Question 838657: I want to solve the divergence sequences with the help of your sequence solver how can I solve them for example
3. What is the next number in the sequence: 3, 8, 18, 38...?
4. What is the next number in the sequence: 5, 9, 17,33,...?
5. What is the next number in the sequence: 9, 3, 1, 1/3,...?
6. What is the next number in the sequence: 24, 12, 6, 3...?

I have like this questions but sequence solver does not help me too much
Kings Regards...
Kaan Hancer from cyprus
Click here to see answer by ewatrrr(24785)

Question 838454: What is equation for sequence 1, 1, 1/2, 1/3, 1/4, 1/9...
Click here to see answer by Edwin McCravy(20056)

Question 838068: sequence 4,12,.....972
can this be arithmetic, if so what is equation for nth term and what term number is 972
can this be geometric, if so what is equation for nth term and what term number is 972

Click here to see answer by Edwin McCravy(20056)

Question 838702: Prove that a sequence is arithmetic
Q: The sum of the first n terms of a progression is given by Sn=n(3n−4). show that the progression is an arithmetic progression
Click here to see answer by richard1234(7193)

Question 838836: the first 3 terms are given
50 , 30 , 18
find the 10th term
Click here to see answer by mxgirl22(39)

Question 838904: I'm in grade 12 and need a simple answer to my question
Given 1,7,x,51
Determine x
Determine Tn
Click here to see answer by richard1234(7193)

Question 839000: Find the sum of the first twenty terms of the sequence 1/2,1/4,0,... -17/4 where -17/4 is the 20th term.
Click here to see answer by ewatrrr(24785)

Question 838980: 1. Suppose each of two shoe boxes contains a mixture of black-and-white marbles. One of the two boxes is to be chosen at random and a marble chosen at random from that box. Let A= the event that box 1 is selected; Let B+ the even that box 2 is selected; C= the event that a black marble is drawn; D= the event that a white marble is drawn.
a. suppose box 1 contains 12 black and 8 white marbles, and box 2 contains 15 black and 10 white marbles. Show that A and D are independent.
b. suppose box 1 contains 8 black marbles and 2 white marbles, and box 2 contains 5 black and 5 white marbles. Find the probability that if a white marble was drawn, it came from Box 1.
c. suppose you have 100 marbles (50 back and 50 white) and are allowed to distribute them between the two boxes anyway you want. How should you do this so as to maximize the probability of that a black marble will be drawn?
If someone could help me out that would be great.
Thanks!

Click here to see answer by psbhowmick(878)

Question 838981: 1. A drawer contains 8 blue socks and 7 red socks. One sock is drawn at random and not replaced. Then a second sock is drawn. Find each probability.
a. The first sock is blue and the second sock is red.
b. The two socks are different colors.
c. The two socks are the same color.
Thanks!
Click here to see answer by ewatrrr(24785)

Question 839174: In how many three-digit numbers are at least two of the digits the same?
Click here to see answer by Edwin McCravy(20056)

Question 836424: 93?35?175?26?128?16=1 in the place of question mark eithe + or - 'm' be the no.of + sign & 'n' be the no.of - sign so m-n=?
Click here to see answer by Edwin McCravy(20056)

Question 839227: The sum of the first 4 terms of an arithmetic sequence is 24. The 7th term exceeds the 4th term by 24. Determine the sum of the first 12 terms
Click here to see answer by alicealc(293)

Question 839922: What are 20 different equations that you could use to get 144?
Click here to see answer by richard1234(7193)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790