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 964036: Ok triangle ABC, if b=20 and m A) 25 B) 15 C) 10 D) 20
Click here to see answer by Fombitz(32388)

Question 964027: The Number Of Sequence Is 17, If The Second Number Is 3, What Is The First Number?
Click here to see answer by Fombitz(32388)

Question 964105: what is the difference between 1/5 0f 10 and 50

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Question 963078: What number comes next in this number sequence?
1 2 8 48 384
Click here to see answer by Edwin McCravy(20056)

Question 964179:
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Question 964192: x+y+z=30 where no. are 1,3,5,7,9,11,13,15

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Question 964283: 1)The sum of the first 13 terms in arithmetic sequence is 1,475.5 while 131 is known to be the 8th term. Find the first term and common difference of this sequence?
Click here to see answer by Edwin McCravy(20056)

Question 964284: A certain cinema has decided to show a popular movie for a total of 4 days. The revenue generated for each day the movie is shown is known to follow a geometric sequence while the total revenue earned over the 4 days amounts to $500. Determine the revenue from the first day the movie is shown as well as the common ratio, if it is also known that the sum of the revenue of the first and second day is four times the revenue of the first day?
Click here to see answer by josgarithmetic(39617)

Question 964373: I am thinking of a number.
I multiply it by 2 and add 104.
I get the same answer if I multiply by 10 and subtract 8.
What is my number?
Click here to see answer by amarjeeth123(569)

Question 964406: Question 952397: 1 3 5 7 9 11 13 15 how to Add any three numbers to get 30. Only simple adding.
Click here to see answer by t0hierry(194)

Question 964587: 1995/1�2 +1995/2�3 + 1995/3�4 +.....+1995/1994�1995
Click here to see answer by amarjeeth123(569)

Question 964685: whats x + y =12

and x - y =-8 solve for x

Click here to see answer by Fombitz(32388)

Question 964685: whats x + y =12

and x - y =-8 solve for x

Click here to see answer by Alan3354(69443)

Question 964685: whats x + y =12

and x - y =-8 solve for x

Click here to see answer by stanbon(75887)

Question 964478: For the arithmetic sequence, find a12 and an, when a1=3 and a4=-12
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Question 962491: What is the smallest positive integer that gives a remainder of 1 when divided
by 4, a remainder of 2 when divided by 5, and a remainder of 3 when divided by
6?
Click here to see answer by Edwin McCravy(20056)

Question 963769: If the sum of the arithmetic sequence is 17 the second term is 3 ,the d is 14 what is the first term
Click here to see answer by Edwin McCravy(20056)

Question 964917: find the 1st term of a geometric sequence if the 2nd term is 3 and the next term is 17
Click here to see answer by Murthy(22)

Question 964965: How do you solve 2(2a+3)+3(a+2))=40
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Question 962602: If a,b,c,d are in H.P., prove that a+d > b+c.
Click here to see answer by Edwin McCravy(20056)

Question 964933: 160, __, __, __, __, 5
Insert four geometric means between 160 and 5. What is the first of these geometric means?
Click here to see answer by Edwin McCravy(20056)

Question 965070: Convert to scientific notation.
28,000,000,000
Click here to see answer by jim_thompson5910(35256)

Question 961783: 12,122,1244
Click here to see answer by Edwin McCravy(20056)

Question 962542: Prove by induction:
1+a+a^2+...+a^(n-1)=(a^n-1)/(a-1)

Click here to see answer by Edwin McCravy(20056)

Question 965123: Question as given - the first four terms in the series sn=13-3n
I've just gone back to college after a long long sabbatical. This professor doesn't actually work/do problems on the board. We're to read the book and figure it out. I've made it through chapter 11.2 and I just cannot figure this out on my own.
Click here to see answer by macston(5194)

Question 965177: The number of the sequence is 17, If the second number is 3, what is the first number?
Click here to see answer by Fombitz(32388)

Question 965253: Which expression can be used to determine the nth term for the pattern below?
13, 8, 3, -2
A. 5n -18
B. -5n + 18
C. n - 18
D. n + 18
Using the expression you selected in question 1 above, Find the eighth term of the same pattern.
Click here to see answer by Fombitz(32388)

Question 965373: True or False
The missing term of the sequence 1, -8, 27, ____, 125, -216 is -76
Please explain answer.
Click here to see answer by Alan3354(69443)

Question 965399: find the missing terms in the sequence _____,2,______,______,-16
Click here to see answer by t0hierry(194)

Question 962492: Set A consists of the numbers in the arithmetic sequence 15, 24, 33.... and Set B consists of the numbers in the arithmetic sequence 21, 27, 33.... What is the sum of the five smallest numbers common to both sets?
Click here to see answer by Edwin McCravy(20056)

Question 965554: Mr. Castro gave his daughter 300 pesos on her 10th birthday, and intends to increase this by 200 pesos each year. How much will he daughter receive on her 18th birthday
Click here to see answer by checkley77(12844)

Question 965550: Write the first four terms of a sequence in which the first term is 2 and each term is 6 more than the preceding term
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Question 965545: write the first five terms of the sequence in which the nth term is 5n-4
Click here to see answer by Edwin McCravy(20056)

Question 965724: A grocer wishes to pile cans of ice cream so that the top layer will contain three cans and each layer will have one more can than the layer above. If there are 10 layers, how many cans would he need ?

Click here to see answer by amarjeeth123(569)

Question 965717: Write the first five terms of the sequence in which the nth term is 5n-4.
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Question 965727: Find the amount of terms in arithmetic sequence with given terms. the first term is 1. The common difference is 1. and the sum is 8515
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Question 965750: the sequence of numbers is 17. if the second number is 3. what is the first number?
Click here to see answer by Fombitz(32388)

Question 965751: Aida gets a starting salary of 6,000 pesos a month, and an increase of 600 pesos annually. What will be her salary during the fifth year
Click here to see answer by checkley77(12844)

Question 965989: Q.1 IF THE RATIO OF AM AND GM OF TWO NUMBER IS 5:4. THE RATIO BETWEEN THE NUMBERS IS 4:1? TRUE / FALSE.. Please advise
Q.2 1. THE NUMBER OF PERMUTATION OF N OBJECTS TAEKN TOGETHER OF WHICH A OBJECTS ARE SAME TYPE AND B OBJECTS ARE OF SAME TYPE AND REMAINING ARE OF SAME TYPE IS n! / a!b!(n-a-b)! ? TRUE / FALSE Please advise
Thanks well in advance.
Regards- Raheeq
Click here to see answer by Theo(13342)

Question 966047: Find the next term in the pattern 4,25,676
Click here to see answer by Alan3354(69443)

Question 966102: A car depreciates in value at the rate of 5% every year. If a car costs 650,000 pesos now, what is its value on the 5th year?
Click here to see answer by rfer(16322)

Question 966131: how to find the nth term of the following sequence.
1, -2, 3, -4, 5,...
Click here to see answer by josgarithmetic(39617)

Question 965862: Can you help me understand how to approach this sequence:
3, -6, 12, 4, 20, ?
Click here to see answer by Edwin McCravy(20056)

Question 966373: Answer for add the three numbers 1,3,5,7,9,11,13,15 geting 30 i can solve it plz give me the ans immedietly
Click here to see answer by Fombitz(32388)

Question 966388: if 17 is the number of sequence and the next number is 3 what is the first number before 17 thanks
Click here to see answer by Fombitz(32388)

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