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 806350: what is one-eight of the sum of 14,15 and 19
Click here to see answer by stanbon(75887)

Question 806364: why is 3 & 2/3 and 5 & 1/4 equal 77/4?
Please respond A.S.A.P
I NEED ANSWER BY TOMORROW MORNING AT 7:00
IF NOT I WILL BE DISAPPOINTED :)
Click here to see answer by oscargut(2103)

Question 801465: what are the first 4 terms whose nth term is n2 + 2
Click here to see answer by tommyt3rd(5050)

Question 800999: Find the sum of the 20th term from this sequence
4,6,8,10,12
Click here to see answer by tommyt3rd(5050)

Question 802788: Find the general formula for :
a) 1, -1/3,1/5,-1/7 ....
b) -1/2, 3/2,-5/2, 7/2....
Click here to see answer by tommyt3rd(5050)

Question 803080: the sum of two numbers is 54 and the difference is 12. what are the numbers?

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Question 807305: What number times another number equals 49 and the sum of 28?
Click here to see answer by MathLover1(20850)

Question 807551: 7/8 = ?/48 [what is ?]

A. 1
B. 42
C. 13
D. 6

Click here to see answer by richwmiller(17219)

Question 807551: 7/8 = ?/48 [what is ?]

A. 1
B. 42
C. 13
D. 6

Click here to see answer by TimothyLamb(4379)

Question 807562: Find the next number in the following sequence:
3,2,3,12,35,78_____
Click here to see answer by Edwin McCravy(20056)

Question 807576: The product and sum of three consecutive terms in a Geometric Progression are 3375 and 65 respectively. Find the difference between the largest and smallest terms of the three numbers
Click here to see answer by stanbon(75887)

Question 807828: What is product of 1 1/2 x 1 1/3 x 1 1/4 x ....... 1 1/99 x 1 1/100
Click here to see answer by Edwin McCravy(20056)

Question 807857: may you please help with this question: There are four boxes in a line.In how many ways can fifteen distinct objects be placed into these boxes such that each box contain at least one object and the number of objects in each box gives a geometric series with integer first term and common ratio?. Thank you!!
Click here to see answer by rothauserc(4718)

Question 801476: what is the sum of 1/4 and 1/7.
Click here to see answer by tommyt3rd(5050)

Question 801679: find n for the given sum of Sn
34+31+28+25+22+...
Sn= -12
Click here to see answer by tommyt3rd(5050)

Question 802065: 15-(-21)-(-17)-(-14)
Help me!!
Click here to see answer by tommyt3rd(5050)

Question 802483: How do you write an expression for a general term of the following sequence?
2,1,3,0,4,-1,5,...
Click here to see answer by tommyt3rd(5050)

Question 807827: f
Click here to see answer by tommyt3rd(5050)

Question 803586: 1. A(n)=-3+(n-1)(5)

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Question 803585: 1. A(n)=-3+(n-1)(5)

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Question 803584: 1. A(n)=-3+(n-1)(5)
2. A(n)=-11+(n-1)(2)
3. A(n)=9+(n-1)(8)
4. A(n)=0.5+(n-1)(3.5)
5. A(n)=-7+(n-1)(5)
6. A(n)=1+(n-1)(-6)
7. A(n)=-2.1+(n-1)(-1.1)
Click here to see answer by tommyt3rd(5050)

Question 803575: 1. A(n)=-3+(n-1)(5)
2. A(n)=-11+(n-1)(2)
3. A(n)=9+(n-1)(8)
4. A(n)=0.5+(n-1)(3.5)
5. A(n)=-7+(n-1)(5)
6. A(n)=1+(n-1)(-6)
7. A(n)=-2.1+(n-1)(-1.1)

Click here to see answer by tommyt3rd(5050)

Question 803574: 1. A(n)=-3+(n-1)(5)
2. A(n)=-11+(n-1)(2)
3. A(n)=9+(n-1)(8)
4. A(n)=0.5+(n-1)(3.5)
5. A(n)=-7+(n-1)(5)
6. A(n)=1+(n-1)(-6)
7. A(n)=-2.1+(n-1)(-1.1)

Click here to see answer by tommyt3rd(5050)

Question 806120: cube of series 1 +3+5+.....+n terms

Click here to see answer by tommyt3rd(5050)

Question 807780: Enter the value of the following sum: 236 + 50
Click here to see answer by tommyt3rd(5050)

Question 807780: Enter the value of the following sum: 236 + 50
Click here to see answer by JBarnum(2146)

Question 805009: Write an equation of the line passing through the given points
(-3,-14) and (7,26)
Click here to see answer by tommyt3rd(5050)

Question 808600: In an arithmetic sequence the seventh term is 9 times the first and the fourth
term is less than the fifth term by 4: Find the first term and the common
difference.
Click here to see answer by mananth(16946)

Question 809338: How do you find the number of digits in: 4^16 (times) 5^25
Click here to see answer by Alan3354(69443)

Question 809487: find 3 numbers that have a product of 504 and a sum 27

Click here to see answer by richwmiller(17219)

Question 809644: Can you please help me solve this word problem { If the initial value of a sequence is 6 and the common difference is 6, what is the 7th element? }
Click here to see answer by josgarithmetic(39618)

Question 809639: 4, 13, 22, 31,.... Then choose the next three numbers
Click here to see answer by josgarithmetic(39618)

Question 809728: Find the first three terms of the geometric sequence defined by: a1 = −2; an = 3an − 1
Click here to see answer by jim_thompson5910(35256)

Question 810025: What is the next in the sequence?
80,40,20, ___,__
Click here to see answer by Alan3354(69443)

Question 810002: if n/6 is equal to 15/90 what is n?
Click here to see answer by Alan3354(69443)

Question 810434: How many term of the series 19+17+15........... must be taken in order to get sum 91?
Click here to see answer by Edwin McCravy(20056)

Question 810623: a(n) =-2.5 times 4^n-1

could you show the work please
Click here to see answer by stanbon(75887)

Question 809915: Find the sum of the arithmetic sequence: 16+22+28+ ... +112
Click here to see answer by tommyt3rd(5050)

Question 810815: find the next term of series
1,3,5,9,17,33
Click here to see answer by erica65404(394)

Question 810832: 1.find the pattern(nth element)for the following sequence
1/6,-3/10,5/14,-7/18,9/22 ...

Click here to see answer by richwmiller(17219)

Question 810854: 1.find the pattern(nth element)for the following sequence

Click here to see answer by richwmiller(17219)

Question 811402: I need help on my homework solving this arithmetic sequence.
The question says write an equation for the nth term of the arithmetic sequence? The numbers are -1,-4,-7,-10.
What would be the equation for it.
Click here to see answer by richwmiller(17219)

Question 811529: How do you find the difference in this algebra question?
1/2, 1/3, 1/6, 0. How do you do this?
Click here to see answer by richwmiller(17219)

Question 811740: Hello. I'm new to algebra this year and am in the 7th grade. What is the rule for the sequence 5, 2, -1, -4...? Thank you.
Click here to see answer by erica65404(394)

Question 811705: Find the next two numbers in the sequence 32, 35, 40, 44, 52, 112.
I tried to find a pattern by using an example on the website and finding the differences, but did not see anything.
32 3 2 3 2 41
35 5 -1 5 43
40 4 4 48
44 8 52
52 60
112

Click here to see answer by Edwin McCravy(20056)

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