Questions on Algebra: Equations answered by real tutors!

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Question 847691: quadratic equations/parabola
x squared + 3x = 18
please show work, thank you.
Click here to see answer by Alan3354(69443)

Question 847717: Given f(x)=-3x+4 and g(x)=x+7, what isthe value of g(f(2))?Please give steps? Thanks so much -H
Click here to see answer by jim_thompson5910(35256)

Question 847739: Por favor me ayude a resolver esta desigualdad por el m�todo anal�tico: X3-6X2+11X-6≥0
Click here to see answer by richwmiller(17219)

Question 847747: Please help me solve this problem: Nick, Ben, and Joseph are volunteering at their local pumpkin patch. Walking in they found a scale to weigh the pumpkins, but the scale started at 100kg. The three boys decided to weigh themselves, though they knew they would not be over that amount, even Nick who knew that he weighed the most, but they decided to weigh themselves in pairs anyway. These are their calculations.
Ben+Joseph=132kg
Joseph+Nick=151kg
Nick+Ben=137kg

Click here to see answer by josgarithmetic(39616)

Question 847770: What are two numbers that multiply to be -60 and add up to -11?
Click here to see answer by Alan3354(69443)

Question 847896: x^2-2xy+y^2=0
Click here to see answer by Edwin McCravy(20054)

Question 847946: What is the solution set for 1/4m+3<1
Click here to see answer by Fombitz(32388)

Question 847936: A football is kicked into the air and this is the equation
h(t)=-4.9t^2+19.6t+2
How do I determine using algebra how long the ball was in the air?
Click here to see answer by Fombitz(32388)

Question 847989: what is the least common multiple of 495 and 4725
Click here to see answer by Fombitz(32388)

Question 848073: Find the equation of the line that contains the point 4, -22 and had slope -5
Click here to see answer by Fombitz(32388)

Question 848073: Find the equation of the line that contains the point 4, -22 and had slope -5
Click here to see answer by swincher4391(1107)

Question 848076: The area of a triangle is 95 square feet.If the height is 5 more than the base, find the length of the height and base of the triangle.
Click here to see answer by stanbon(75887)

Question 848097: Find the.equation of the line that passes through the points -3, -14 and 1 , -2
Click here to see answer by swincher4391(1107)

Question 848097: Find the.equation of the line that passes through the points -3, -14 and 1 , -2
Click here to see answer by lwsshak3(11628)

Question 848109: Find the slope of the line containing the.given points. R small 1(2, -)2 P small 2 (5, 2)
Click here to see answer by stanbon(75887)

Question 848232: Find the equation of the line that passes through. the pounts 2, -5 and 6, -17
Click here to see answer by swincher4391(1107)

Question 848240: Find equation of the line that passes thru the piints 0, 9 and -5, 13
Click here to see answer by swincher4391(1107)

Question 848095: Find the equation of the line that.contains the.point 9, -19 and has slope -2
Click here to see answer by ankor@dixie-net.com(22740)

Question 848305: Darnell currently makes $12.42 per hour at his job at the library. He recently received a 15% raise. Write and solve an equation to find Darnell's pay rate before his recent raise.
Click here to see answer by richwmiller(17219)

Question 848310: express log2 1/6=-3 in exponential form
Click here to see answer by stanbon(75887)

Question 848304: a number increased by 8 is equal to twice the number decreased by 1

Click here to see answer by richwmiller(17219)

Question 848320: Find an equation of line passes thru the points 0,0 and -5, 4
Click here to see answer by richwmiller(17219)

Question 848326: Find the x and y intercepts of the line y = 2x + 6
Click here to see answer by swincher4391(1107)

Question 848307: find the dimensions of a rectangle with perimeter of 240 m if the length is 4m longer than the width

Click here to see answer by swincher4391(1107)

Question 848336: Darnell makes $12.42 per hour and received a 15% raise. Another employee named Jan gets a $1.50 raise. Is it less or more than Darnell's raise?
Click here to see answer by swincher4391(1107)

Question 848400: What two numbers add to get 48 but also add to get -65?
Click here to see answer by harpazo(655)

Question 848440: When 2 is added to
1
5
of a number n the result is 3.2. Write an equation describing this and find the value of n.
Click here to see answer by ewatrrr(24785)

Question 848545: Hi! I need some help figuring out a few algebra equations, and I do have answers in mind for each problem which I will mention at the end. :) Thank you!!!
Solve each equation below by undoing.

1. 4x+(-12)=8
2. 6+(-x)/2=14
3. -3+5x-7=20

Thanks! Hope you can help, I would love the answers ASAP! Thank you so much!
P.S.
For #1 I thought the answer was x=5 because 4*5=20 and 20+(-12)=8...I think.
For #2 I thought the answer was x=16 because 16/2=8 and 6+8=14, but it did say it was a -x so I'm confused on that part if you are willing to help.
For #3 I thought the answer was x=-2 because 5*(-2)=-10 and -3+(-10)=-13 and -13-7=-20.
Hope that helped! Thanks again!!!
Click here to see answer by swincher4391(1107)

Question 848547: a(x + y) - a(x - y)
Click here to see answer by swincher4391(1107)

Question 848544: 6 x 7 - 3 + 2 = __
Click here to see answer by swincher4391(1107)

Question 848555: Hello! I need some help on two algebra equations and I do have some answers in mind which I will mention at the end. Thank you!!! :)
1. -3(x-14)=42
2. 2-x+4=5

Thanks! Please help, need answers ASAP! Thank you so much!
P.S.
For #1 I thought the answer was x=0 because if you subtract 14 from 0 it would equal -14 and -3*(-14)=42.
For #2 I thought the answer was x=1 because 2-1=1 and 1+4=5. (that one was easy, but hard to use undoing with.)
Hope that helped! Thanks again!!!!
Click here to see answer by Alan3354(69443)

Question 848676: write the number that makes each number sentence true.
80+10=90-______
i dont understand how to figure this out. Please help
Click here to see answer by jim_thompson5910(35256)

Question 848700: How to solve two step equations w/ rational numbers
Ex: -5n-7=23
Click here to see answer by jim_thompson5910(35256)

Question 848795: the left and right page number of an open book are two consecutive integers whose sum is 399
Click here to see answer by Alan3354(69443)

Question 848942: Hello,
Here is a picture of the question as I don't know how to write it out on a browser.
http://gyazo.com/2e614a778de78bd12c45e11887451f1e
Hope you can help,
Mnay thanks.
Click here to see answer by swincher4391(1107)

Question 849364: 5(x+1)-4(x+2)=-8
Any chance you could help me here Please show steps of working out for me.
Click here to see answer by josmiceli(19441)

Question 849504: The cost to rent a car for a certain number of hours is shown in the table. The total cost includes a fixed fee and an hourly rate.
Number of hours Cost
3 $89.25
6 $118.50
14 $196.50
A. Write an equation to model the data. Use y to represent the total cost and x to represent the number of hours the car is rented.
B. What is the fixed fee charged to rent the car?
c. What is the hourly rate charged to rent the car?

Click here to see answer by stanbon(75887)

Question 849531: Help!!!!SOS!!!!! I have been given this formula and given this instructions, I have been at it for 3 hours and I'm completely lost!!!!
Instructions X2 - 2X- 13 =0
a) Move the constant term to the right side of the equation.
b) Multiply each term in the equation by four times the coefficient of the x squared term.
c) Square the coefficient of the original x term and add it to both sides of the equation.
d) Take the square root of both sides.
e) Set the left side of the equation equal to the positive square root of the right side and solve for x.
f) Set the left side of the equation equal to the negative square root of the right side and solve for x.

Click here to see answer by richwmiller(17219)

Question 849490: Solve Algecraically:

Click here to see answer by josgarithmetic(39616)

Question 849540: Please help me to find the value of x for which fraction x^2-9/2x^2-7x+3 is undefine
Click here to see answer by stanbon(75887)

Question 849573: What is the value of c and d in 4cx-5c=-12x+d
Click here to see answer by josgarithmetic(39616)

Question 849562: how do i figure out -7x-3x+2=8x-8?
Click here to see answer by checkley79(3341)

Question 849780: solve for r: v= 1/3*pi*r^2h
Click here to see answer by harpazo(655)

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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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, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 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20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 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, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 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