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

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Algebra: Sequences of numbers, series and how to sum them

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Question 214017: 8 16 14 10 whats the next 3 numbers in the sequence
Click here to see answer by HyperBrain(694)

Question 214365: find the nth term of an A.P. whose (r+1)th term is 4r-3
Click here to see answer by stanbon(26268)

Question 214501: There are three numbers in the ratio of 2:3:4. The sum of their squares is 464. Find the numbers.
Click here to see answer by rfer(2688)

Question 215270This question is from textbook Discovering Advanced Algebra An Investigative Approach

: On Exercise 2 page 48 chapter 1, I don't know how to solve each equation.This question is from textbook Discovering Advanced Algebra An Investigative Approach

Click here to see answer by drj(1380)

Question 215440: solve r=a+(n-1) d for d
Click here to see answer by vleith(1977)

Question 215706: 4-7i divided by 5+6i
I understand that you have to foil the opposite of the denomenator, but i have trouble simplifying. I got as far as 20-59i+42i^2 over 25-36i^2.
I hope you understand my question. Thank you.
Click here to see answer by scott8148(3382)

Question 216171: describe each sequence using words and symbols
sequences and equations
46,52,58,64,....
Click here to see answer by checkley77(7049)

Question 216244: Please help me find the next number in the sequence,
1,7,31,127,...
Click here to see answer by stanbon(26268)

Question 216598: I need help finding out what the numbers are going up by.
The sequence is 2,3,5,7,11
Click here to see answer by ichudov(404)

Question 216598: I need help finding out what the numbers are going up by.
The sequence is 2,3,5,7,11
Click here to see answer by DRichardson(63)

Question 216229: what is the formula for this sequence 0, 2, 5, 9, 14
Click here to see answer by ichudov(404)

Question 217318: The third term of an arithmetic sequence is 4 and the sum of the first 8 term is 36. Write down the first 8 term of the sequence.

Click here to see answer by drj(1380)

Question 217741: How do you work this problem? A-R=R
Click here to see answer by RAY100(1637)

Question 217752: The product of twice a number and three is the same as the difference of five times the n umber an d 3/4. Find the equation and solve.
Click here to see answer by RAY100(1637)

Question 218437: 1*3+3*5+5*7+7*9+9*11+11*13+13*15+15*17
Click here to see answer by tlouvierre(4)

Question 219879: What is the next number: 62,53,44,71,17
Click here to see answer by stanbon(26268)

Question 219869: The sum of two consecutive terms in the arithmetic sequence 1, 4, 7, 10, ... is 299. Find these two terms.
Please help! :)
Click here to see answer by scott8148(3382)

Question 219958: Miriam is four years older than Ricardo. Ten years ago, Miriam was 3 times as old as Ricardo was then. How old are they now? Set up an equation and solve.
Please help! :)
Click here to see answer by ankor@dixie-net.com(6693)

Question 220545: The sum of three numbers is 105. The second number is 10 larger than the first and the third is one-half the second. Find the three numbers.

Click here to see answer by stanbon(26268)

Question 221265: 3s + 1d = £3.50
2d + 1s =£3.25
What does S and D equal

Click here to see answer by Alan3354(6079)

Question 221574: Solve the formula A = 2pierh + 2pier^2 for h.
Click here to see answer by Alan3354(6079)

Question 221632: "write and solve an equation to find the nth term of each aritmetic sequence"
3,7,11,15, . . . n=8
10,5,0,-5, . . . n=21
34,49,64,79, . . . n=200

Click here to see answer by stanbon(26268)

Question 222061: number sequences
start with 3 and multiply by 3 each time, How do you find the 20th term there must be an easy way without having to count all the way up.
Click here to see answer by solver91311(5072)

Question 222447: what is the missing term: 1,4,16,-,256?
Click here to see answer by vleith(1977)

Question 222445: A ball is dropped from 13.5ft, after each bounce the ball goes up by 60% of the previous bounce. How high will the ball go after the 38th bounce?
Click here to see answer by solver91311(5072)

Question 222358: hey there thanks ,the question is-
the difference between two numbers is 4 and the sum of their squares is80 less than three times their product. Find the numbers
thanks again.
xx

Click here to see answer by ankor@dixie-net.com(6693)

Question 222740: for three consecutive odd intergers, the sum of the least and greatest is 146. What is the sum of all three intergers?

Click here to see answer by stanbon(26268)

Question 222954: What is the next term in the geometric sequence 16,-4,1,-1/4,.....I have the answer just need to know how to get the answer
Click here to see answer by jsmallt9(590)

Question 222965: what is the product of two consecutive integers is 1 more than their sum. Find the integers?
Click here to see answer by jsmallt9(590)

Question 222964: what is the product of two consecutive integers is 1 more than their sum. Find the integers?
Click here to see answer by jsmallt9(590)

Question 222944: 31+34+37+.....+325+328=
the numbers go up in three's. what is the sum of the question above
Click here to see answer by jim_thompson5910(13787)

Question 223035: Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 40 miles per hour and train B is traveling at 48 miles per hour. Train A passes a station at 2:15 P.M. If train B passes the same station at 2:30 P.M., at what time will train B catch up to train A?
When will train B catch up with train A?
Click here to see answer by rfer(2688)

Question 223743: what is the general term for sequence
1,2,3,4,5,6.....
Click here to see answer by drj(1380)

Question 223759: what is the nth term 3,6,11,18,27,38
Click here to see answer by rfer(2688)

Question 224627: The first three terms of an arithmetic series have a sum of 24 and a product of 312. What is the fourth term in the series?
Click here to see answer by Edwin McCravy(2922)

Question 224797: Hello,
Trying to help my son with maths. never did well at school.
What is the sequence of 1, 2, 6, 24, 120, 720 and how and why
Regards
Martin
Click here to see answer by Alan3354(6079)

Question 225448: how do work out the value of N in a sequence of numbers e.g. 3.11.19.27. =?N
Click here to see answer by checkley77(7049)

Question 227402: One estimate of the population of the world on January 1, 2005, is 6,486,915,022. The population is estimated to be increasing at the rate of 1.4 percent per year. At this rate, what will the population of the world be on January 1, 2025? Round your answer to the nearest whole number.

Click here to see answer by josmiceli(3007)

Question 227476: This question is about LCM and GCD:
A rectangular field with dimensions 75 ft. by 625 ft. is to be divided into same-size square plots. If the sides of the squares need to be whole numbers of feet long, what are the largest squares possible and how many such squares will fit in the field? Please help :)
Click here to see answer by jsmallt9(590)

Question 227525: A number n is 1 plus the sum of the squares of three consecutive odd integers. What is the largest integer factor of all such numbers n?
Click here to see answer by jsmallt9(590)

Question 227716: You have 10 books, and a bookshelf that has room for 6 of them. How many ways can you arrange the books on the bookshelf?

Click here to see answer by stanbon(26268)

Question 227715: FLU EPIDEMIC HITS TEXAS TOWN! 30% increase in cases reported this week. Today there were 100 cases reported to begin the annual flu season. If this rate continued how many cases would be reported 4 weeks from now?
Click here to see answer by josmiceli(3007)

Question 227891: what is the general term formula for: 1,2,4,8,16,32,64,128,256,512
Click here to see answer by Alan3354(6079)

Question 228628: Step by step on how to solve the infinite sequence, 1/2, -1/2, 1/2, -1/2
Click here to see answer by jim_thompson5910(13787)

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