Questions on Algebra: Equations answered by real tutors!

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Question 696930: Determine the best method to solve the system of equations; then solve the system
x=2y-1, 3x-3y=9
Click here to see answer by stanbon(75887)

Question 696958: On the third day of a school fundraiser, I sold 14 bags of flower bulbs. This was twice as many as the second day. On the second day, she sold two more bags than on the first day. How many bags did I sell on the first day
Click here to see answer by lwsshak3(11628)

Question 696969: Find all zeros of f(x)=3x^3+9x^2-5x-15
Click here to see answer by MathLover1(20849)

Question 697011: 3+p=8
Click here to see answer by lynnlo(4176)

Question 697024: 6 ~ 2(1+2) = ?
Click here to see answer by Alan3354(69443)

Question 697051: Solve: 2x+2y= -4
x-2y=1
a)(-6, -1) b) (-1, -1) c) (0,-2) d) no solution.
*i thought it was B but i checked, and also got C! :[
Three times the sum of a number and 17 is at least 114. Let x represent the number and find all possible values for the number
a)x _> 55 b) x <_ 21 c) x <_ 55 d) x_> 21
Click here to see answer by josmiceli(19441)

Question 697088: solve the following algebraically:

my work:

Then i subtracted from both sides and got:
-21x+9=0 and pulled out a 3 and got 3(7x+3) as my final answer.
Click here to see answer by MathLover1(20849)

Question 697090: solve the following algebraically:

I see that both sides of the equation have a the only exception is the +4. I'm not sure what I am supposed to do with the four. Should I put a one under it? I don't understand how I am supposed to solve for "x"
Click here to see answer by ankor@dixie-net.com(22740)

Question 697095: 12/a=4/a-4

Click here to see answer by algebrahouse.com(1659)

Question 697163: Michelle has a party and invites 3 friends., each friend invites 3 other friends . each of these friends invites 3 more friends . Finally, each of these friends invites 3 more friends. each guest at the party brings 3 gifts with 3 bows on each gift. how many bows does michelle get at the party ?
Click here to see answer by god2012(113)

Question 697065: simplify 3q/2+p/q, 2/a-3+3/a
write as a single fraction in the lowest term 5/y-4/y-3, 6a/3b/4asquared/b
fractorize 14mpsquared+21msquaredp, 5asquaredb+absquared
solve the equations 6x-8(x+3)=10, 2(x-1)=5/2
solve for x x+2/2 -x-1/3=2, 3(x+2)/2-8=x-1/3

Click here to see answer by lynnlo(4176)

Question 697317: Given m angle ABC=123, find m angle ABD

Click here to see answer by Alan3354(69443)

Question 697324: I do not understand at all
Donald gave Louie a number of marbles to share with Dewey and Huey. Making sure that he got his share, Louie took one-third of the marbles and hid them. Dewey, after hearing from Donald that he is entitled to one-third of the marbles as well, went and hid one-third of the remaining marbles. Not knowing what was going on, Daisy took two marbles from the pile. When Huey came, there were only 10 marbles left. How many marbles did Donald give to Louie in the beginning?
This is as far as I have gotten.
x-1/3-(1/3)-2
Click here to see answer by josmiceli(19441)

Question 697333: Solve 3x+4>2X+7
Click here to see answer by lynnlo(4176)

Question 697418: A river flows at a speed of five miles per hour. A steamboat went upstream for five hours and stopped at a point 20 miles from where it started. What is the speed of the steamboat in still waters?
20/(x+5)+20(x-5)=5
20(x+5)+20(x-5)=5x^2-125
40x=5x^2-125
8x=x^2-25
x^2-8x-25
After that, I don't know what to do?
Click here to see answer by ankor@dixie-net.com(22740)

Question 697517: d= 55t, solve for t
Click here to see answer by lynnlo(4176)

Question 697578: how do you solve the equation of y-y with the exponent on the bottom of 1 = m( x - xwith the exponent on the bottom of 1) if y is 3 and x is 22?

Click here to see answer by Edwin McCravy(20054)

Question 697740: The Axel Car Rental Company rents compact cars at a daily basic rate of $29.99. If a customer is offered a 20% discount on the daily basic rate what will a customer's total basic rate be for a three day rental of a compact car at Axel Car Rental Company?
29.99*.20=5.9980
5.9980*3=17.99
The answer is wrong, but I don't understand why.
Click here to see answer by Positive_EV(69)

Question 697749: If 1000 kids averaged 80% on a test how many more 100% scores would a school need to increase the average to 85%?
I need to make this into a formula. Thank you
Click here to see answer by reviewermath(1029)

Question 697777: This month Jenny bought six less than twice the number of gallons of gasoline for her car than she did last month. If the total number of gallons of gasoline that Jenny bought this month and last month is 150, how many gallons of gasoline did Jenny buy this month?
n is gasoline.
n-y=150
2n-6=150
(6n-6y=900)-(2n-6y=150)
4n=750
n=187

Click here to see answer by josmiceli(19441)

Question 697804: Can you help me with this question.
Write the equation of the line that passes through each pair of points in the slope- intercept form. (-5,-4) and (15,0)

Click here to see answer by josmiceli(19441)

Question 697812: I am not in school just looking for the name of a theorem that goes something like
-b +- the square root of b squared -4ac divided by 2a. You can reach me at
Name_is_jennifer@yahoo.com
Click here to see answer by jim_thompson5910(35256)

Question 697897: Suppose you enter an elevator at a certain floor. The elevator moves up 6 floors, down 4 floors, and up 2 floors. You are then at floor 7. At which floor did you initially enter the elevator?
Click here to see answer by algebrahouse.com(1659)

Question 697895: Find a number that is 58 more than the sum of its third, tenth, and twelfth parts?
Click here to see answer by MathLover1(20849)

Question 697894: When you add 12 to a number and then divide the sum by 13, you get the same result as when you subtract 13 from the number and then divide the difference by 12. What's the number?
Click here to see answer by ankor@dixie-net.com(22740)

Question 698007: Vout = R1/(R1+R2) * Vin Solve for R1
Click here to see answer by MathLover1(20849)

Question 698013: 12 less the quotient of a number ad 7 is -2

Click here to see answer by MathLover1(20849)

Question 698010: A store sole 550 video games during the month of December. If this made up 12.5% of its yearly video game sales, about how many video games did the store sell all year? I tried multiplying 550 with 100 and dividing that by 12.5% but I don't think it's right
Click here to see answer by rfer(16322)

Question 698140: how do I solve problems like this
8/3x=4/5
Click here to see answer by Stitch(470)

Question 698140: how do I solve problems like this
8/3x=4/5
Click here to see answer by unlockmath(1688)

Question 698145: The point ( 2,1) is a solution to which of the following systems of equations ?
Click here to see answer by MathLover1(20849)

Question 698160: what are the first 5 multiples of 13?
Click here to see answer by solver91311(24713)

Question 698160: what are the first 5 multiples of 13?
Click here to see answer by MathLover1(20849)

Question 698188: can you help me solve: x+2y=22
-x+2y=10 and the answer is with an ordered pair!

Thank you!
Click here to see answer by stanbon(75887)

Question 698202: Peter took a 1,500 mile trip in 5 days. Each day, he drove 30 miles more than the day before. How many miles did he cover on the first day?
x+x+30+x+30+x+30+x+30=1500
5x+120=1500
5x=1380
x=276
The answer is not correct. What am I doing wrong?
Click here to see answer by stanbon(75887)

Question 698253: This is on my son's homework and I keep getting an answer that doesn't make sense. 21(2-x)+12x = 44
When I distribute, I get 42-21x +12x = 44
Then, -21x+12x=2
-9x=2
x=-.2222
What are we doing wrong?
Click here to see answer by jim_thompson5910(35256)

Question 698243: I am in math091 at college and I am having issues solving(2x-3)^4
The only two answers I have figured out is 16x^4-81 and 16x^4+81
Click here to see answer by Edwin Parker(36)

Question 698388: What is the solution of the equation?
3*(fifth root(x+2)^3)+3=27
Click here to see answer by Alan3354(69443)

Question 698356: what does x equal if 6x-26 has to be equal to 5x+28

Click here to see answer by Stitch(470)

Question 698356: what does x equal if 6x-26 has to be equal to 5x+28

Click here to see answer by Simnepi(216)

Question 698422: what is the slope-intercept form of (2,0); perpendicular to 5y=-x+2 for the line that passes through the given point?

Click here to see answer by josmiceli(19441)

Question 698452: What is the answer to the equation-
0= 4nsquared + n
Click here to see answer by Stitch(470)

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, 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23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 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33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580