Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE) Get help from our free tutors ===> Algebra.Com stats: 2011 tutors, 419004 problems solved View all solved problems on Equations -- maybe yours has been solved already! Become a registered tutor (FREE) to answer students' questions. Click here to see problems AND answers on one page Question 266346: L=a+(n-1)d ;d=? Click here to see answer by stanbon(57246)   Question 266377: How do you solve: 2y/3-4=y/6-1 Thanks Click here to see answer by jim_thompson5910(28504)   Question 266430: 5-9x=140-44x Click here to see answer by jim_thompson5910(28504)   Question 266437: 4x-3+2x=8x-3-x Click here to see answer by user_dude2008(1861)   Question 266556: Solve for the literal equation of X. 16(x-a) = 4(2a-x) Click here to see answer by drk(1908)   Question 266559: Solve for the literal equation of X. 0.25ax = 3ab Click here to see answer by drk(1908)   Question 266561: Solve for the literal equation of X. ax/6 = 2b Click here to see answer by drk(1908)   Question 266557: Solve for the literal equation of X. 13(x+2g) - 3(4x+5g) = 0 Click here to see answer by drk(1908)   Question 266777: those are franctions....how do I solve this equation Click here to see answer by Edwin McCravy(8882)   Question 266847: Find the x-intercept Click here to see answer by dabanfield(803)   Question 266972: using 7 sevens how can i get 100 Click here to see answer by Edwin McCravy(8882)   Question 266644: 1. If two-thirds of a number is decreased by 30, the result is 10. Find the number. Click here to see answer by richwmiller(9135)   Question 267148: Need help with this equation: Solve the equation if possible if not enter none: |6-x|+4=18 x= smaller value x= larger value thanks Click here to see answer by psbhowmick(529)   Question 267198: how would i find out the answer too the problem 16=4w+2w-2 Click here to see answer by drk(1908)   Question 267077: 5/x + 2/5 = 7/x Click here to see answer by ankor@dixie-net.com(15638)   Question 267268: I need to represent the following as an equation: "The sum of a certain two-digit number is 7. Reversing its digits increases the number by 9. What is the number?" The answer is 34. But, how do you represent the first 1/2 of the problem in an equation? I came up with several ways to represent the part of the equation that is the second half of the problem. I do not know how to represent "the sum of a certain two-digit number"... Click here to see answer by jim_thompson5910(28504)   Question 267268: I need to represent the following as an equation: "The sum of a certain two-digit number is 7. Reversing its digits increases the number by 9. What is the number?" The answer is 34. But, how do you represent the first 1/2 of the problem in an equation? I came up with several ways to represent the part of the equation that is the second half of the problem. I do not know how to represent "the sum of a certain two-digit number"... Click here to see answer by stanbon(57246)   Question 267370: Laura is a salesperson in a retail store and earns $66 per week plus 11% of her weekly sales. If Laura earned $209 one week, what were her sales that week? Click here to see answer by rfer(12647)   Question 267507: Solve by completing square (2y-3)^2=5 Click here to see answer by drk(1908)   Question 267495: please help... have to solve by completing square 2r^2+10r+11=0 Click here to see answer by stanbon(57246)   Question 267537: P=4s;solve for s Click here to see answer by Alan3354(30983)   Question 267567: Income after tax is deducted is $25840, the percentage of tax deducted is 20%, how can I find the dollar value of tax deducted? Click here to see answer by rfer(12647)   Question 267686: What is the equation for finding percentage? Example: There are 240 units in an apartment building. If 226 of them are occupied, what is the percentage of the available units? I am trying to find the actual equation. A=240-226 divided by? Brandy Click here to see answer by richwmiller(9135)   Question 267925: A man left an estate of 64,000 to three children. the eldest child received 3 times as much as the youngest. the middle child received 14,000 more than the youngest. how much did each child received? Click here to see answer by palanisamy(496)   Question 267980: 56 - (3/8(x)-6) = (1/4(y)) Click here to see answer by richwmiller(9135)   Question 267904: 3/4x=15 why would the answer be 20? I understand that you have to multiply the reciprocal 4/3 by both sides however I am lost after that. Could you please explain this to me? Click here to see answer by ankor@dixie-net.com(15638)   Question 268020: A bartender has rum that is 40% alcohol. How much rum and how much cola need to be mixed together to make 5 liters of rum-and-cola that is 16% alcohol? I can't figure out the equation to use to solve this problem..... Click here to see answer by stanbon(57246)   Question 268044: Find an equation of the line containing the given par of points (2,4) and (6,5) Click here to see answer by jim_thompson5910(28504)   Question 268048: what is the expression 7 subtracted from 8n Click here to see answer by unlockmath(1599)   Question 268048: what is the expression 7 subtracted from 8n Click here to see answer by jim_thompson5910(28504)   Question 268286: Please help with this problem, this is what I have so far: Problem: Height of a projected ball, An astronaut on the moon throws a baseball upward. The astronaut is 6ft., 6in. tall, and the initial velocity of the ball is 30 ft. per sec. The height S of the ball in feet is given by the equation S= -2.7t^2 + 30t + 6.5 where t is the number of seconds after the ball was thrown. A.) After how many seconds is the ball 12ft above the moon's surface? Round to the nearest hundreth. I know I have to look for the seconds, which is t so then I have to solve for S, the height. This is have I've got so far: 12 = 2.7t^2 + 30t + 6.5 -12 -12 ------------------------ 0 = 2.7t^2 + 30t - 5.5 B.)How many seconds will it take fore the ball to return to the surface? Round to the nearest hundredth. So on the second part of the equation I have to look for the time, so that means that I have to solve for the height... Thanks for your help in advance. Click here to see answer by Alan3354(30983)   Question 268286: Please help with this problem, this is what I have so far: Problem: Height of a projected ball, An astronaut on the moon throws a baseball upward. The astronaut is 6ft., 6in. tall, and the initial velocity of the ball is 30 ft. per sec. The height S of the ball in feet is given by the equation S= -2.7t^2 + 30t + 6.5 where t is the number of seconds after the ball was thrown. A.) After how many seconds is the ball 12ft above the moon's surface? Round to the nearest hundreth. I know I have to look for the seconds, which is t so then I have to solve for S, the height. This is have I've got so far: 12 = 2.7t^2 + 30t + 6.5 -12 -12 ------------------------ 0 = 2.7t^2 + 30t - 5.5 B.)How many seconds will it take fore the ball to return to the surface? Round to the nearest hundredth. So on the second part of the equation I have to look for the time, so that means that I have to solve for the height... Thanks for your help in advance. Click here to see answer by scott8148(6628)   Question 268341: Solve 2x+3=x+5 Click here to see answer by rfer(12647)   Question 268382: the sum of two numbers is 208. one-third of the greater numbers equals the smaller number. what are the numbers? Click here to see answer by mananth(12270)   Question 268402: -1/3t + 2/9 = 7/9 Click here to see answer by mananth(12270)   Question 268484: please help me solve this equation 13/24+31/36+73/48= the / means - i couldnt put the - sign to where it would look right as an equation lol sorry i hope u can understand what im talkin about lol Click here to see answer by Alan3354(30983)   Question 221426: With these thoughts in mind, consider different strategies you can use to solve the following problem: 452 + 721 + 908 Solve the problem using at least two methods other than the traditional algorithm. You may add 400+700+900=2000, then add the tens and ones 52+21+08=81, and lastly add these two numbers together 2000+81=2081. You may add two numbers at a time: 452+721=1173+908= 2081. Click here to see answer by mathtechesnba(1)   Question 268515: how many ways you can solve the problem: 452 + 721 + 908 Click here to see answer by solver91311(16868)   Question 268561: solve by factoring and using principle of zero product. 5x^2-66=4x^2+5 Am I starting it off correctly 5x^2-66=0 and 4x^2+5=0 then solve for x^2? Click here to see answer by Alan3354(30983)   Question 268606: The product of two consecutive odd integers is 2 less than six times their sum. Can you find the two integers Click here to see answer by drk(1908)   Question 268602: classify the sequence as arithmetic,geometric,both or none of these. justify your answer. if arithmetic,given d;if geometric, give r; if none of these, state a pattern using your own words. 120,120,120,120,120... Click here to see answer by drk(1908)   Question 268835: 3/8b=-9 ??????????????????????? Click here to see answer by checkley77(12569)   Question 268856: Find the equation of a line. Write in standard form. Slope=1; y intercept=0 Click here to see answer by vksarvepalli(154)   Question 268383: factor: a^2-5a-14 Click here to see answer by Alan3354(30983)   Question 268942: t/3 – t/2 > 3/4 Click here to see answer by persian52(158)

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