Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 253628: what is the slope and y-intercept of the line 3x-8y=42
Click here to see answer by drk(1908)

Question 253628: what is the slope and y-intercept of the line 3x-8y=42
Click here to see answer by stanbon(75887)

Question 253643: WHAT IS Y=-3/4 IN STANDARD FORM?
Click here to see answer by jim_thompson5910(35256)

Question 253648: How many moles in 125 grams of gold?
Click here to see answer by richwmiller(17219)

Question 253666: 4(z-1)=16
Click here to see answer by edjones(8007)

Question 253692: A new car loses 20% of its original value when you buy it and 8% of its original value per year . A 6 year old car is worth $12000 what was the original value?
Click here to see answer by stanbon(75887)

Question 253724: what are the solutions of the equation 2x^2 + x - 28 = 0
1.) 7/2,4
2.) 7/2,-4
3.) 2,7
4.) -2,7
5.) -2,-7
Click here to see answer by unlockmath(1688)

Question 253763: Find t in the equation.
t/p=D
if p=4 and D=5
Click here to see answer by richwmiller(17219)

Question 253753: Find the area of the shaded part of the figure. Use 3.14 for π. Do not round your answer.
square box with circle in it shaded is the outside of the circle and on the outside of the bottom of box is 15ft which wold be width, and the height would 15 ft.
Click here to see answer by richwmiller(17219)

Question 253835: 4 1/5 x 3/4 x 6 = ?
Thank you in advance for your help!
Click here to see answer by Alan3354(69443)

Question 253847: .6% of 18 equals ?
I come up with the correct answere but I am not sure how to place the decimal or what to do with the 6% to multiply by the 18. Thank you in advance for any help you can give me!
Click here to see answer by MRperkins(300)

Question 253887: give give the percent of each number 1. 55% of 35

Click here to see answer by checkley77(12844)

Question 253894: I am having trouble with a function table.
x Input y is the output #t
x / y
0 / -15

1 / -7
2 / 1
3 / 9
4 / 17
5 / 25
Part A
Write the equation that show how to determine the value of y for any value of x.
Answer_______________ y=

Part B
Use the equation to find the corresponding y-values for x = 6, 7, and 8.
Answer__________33, 41, 49_____________
I was able to see that the values in the y column were increasing by 8
from one line to the next. So I am quite sure that my part b answer is
correct. The only problem is that I couldn't figure out the rule to
create the equation. I was trying to multiply, and subtract and add numbers
and I just couldn't get it.
Please help if you can.
Click here to see answer by drk(1908)

Question 253916: I have been given this formula. R=s+2t If I know that s is three times greater than t, how coul I rewrite this formula?
R=3(s+t)
R=5s
R=5t
I don't know which one would be the best. Please help. Thank you. Leanne
Click here to see answer by scott8148(6628)

Question 253919: What is the value of c in the formula c+square root 2a2 + b2, if a=4 and b=5?
Thank you for your help. Darrell
Click here to see answer by drk(1908)

Question 253938: If the perimeter of a rectangle is expressed by the formula p=2l+2w, the side w can be found by the formula???
w=p-l over 2
w=p-2l over 2
w=p-a
I am obviously confused. Thank you for your help.
Click here to see answer by richwmiller(17219)

Question 253950: What is 4 less than a number ?
Click here to see answer by richwmiller(17219)

Question 253950: What is 4 less than a number ?
Click here to see answer by stanbon(75887)

Question 253949: This is a linear equation.
y = 1/2x + 1
Part a
Complete this table of values for the equation.
Input X Output Y
-4/
-2/
0
2
4
These are the values that I came up with for the Y output

-4/ -1
-2/ 0
0/ 1
2/ 2
4/ 3

I hope that I have the Y output values correct. Do I?
The problem is that I now have to graph the equation which I did complete,
but I want to make sure that I did it correctly.
I don't know if anyone can put a graph on here so that I can see if mine is
correct.
This is how I plotted the points on my X and Y axis graph.
I looked at the points and plotted them like this (-4/-01)
(-2/0)
(0,1)
(2,2)
(4,3)
It ended up looking like the slope of a mountain from the lower left being the
lowest and gradually increasing as a slope.
Can you please tell me if my output values are correct, and the way I handled
graphing the values.

Click here to see answer by richwmiller(17219)

Question 253940: Please help me solve the following equation:
bx over d = ce over f
1. x=ce over bdf
2. x=ced over bf
3. x=bcde over f
I appreciate any input you have. You're already a wizard to me. Thanks so much.
Click here to see answer by jim_thompson5910(35256)

Question 254071: Word problem.
a number equals 6 less than 4 times a number. what is the number?
Click here to see answer by palanisamy(496)

Question 254046: Northbound train travels 60 mph and leaves at 4am.
Southbound train travels 75 mph and leaves at 4am.
What time will it be when the two trains are 810 miles apart?
thenorwoodfour@bellsouth.net
Click here to see answer by oberobic(2304)

Question 254170: What is the reciprocal of the number 2?
I think it's 2/1 Is that right? Thank you for your help.
Click here to see answer by dabanfield(803)

Question 254170: What is the reciprocal of the number 2?
I think it's 2/1 Is that right? Thank you for your help.
Click here to see answer by Edwin McCravy(20055)

Question 254173: If the area A of a triangle is 60 square meters and the base b is 20 meters, what it the altitude h?
1. 2/3 m
2. 11/2 m
3. 6 m
Thanks ahead of time. You're a great help.
Click here to see answer by dabanfield(803)

Question 254164: Use symbols to express the rule as the equation. Use single letters to stand for the variables. Identify what each letter represents.
e. A half-cup of unpopped popcorn is needed to make 6 cups of popped
popcorn.
.
Click here to see answer by richwmiller(17219)

Question 254175: The formula for the correction of a length c of a steel tape to allow for sag is as follows: c=w2 l3 over 24t2. Can you help?
1. w= square root ct2 over 24l3
2. w= square root cl3 over 24t2
3. w= square root 24t2c over l3
Thanks you wizards. That's what you are.
Click here to see answer by solver91311(24713)

Question 249872: How to solve Y - 4X = 9
Click here to see answer by richwmiller(17219)

Question 254176: The expression a=3b2 + 2 can be written in words as the quantity a is equal to
1. three times the quantity two plus b squared.
2. two more than three times the quantity b squared.
3. two plus the square root of three x b.

I'm just a bit confused. Please help. Thank you very much.
Click here to see answer by rfer(16322)

Question 254178: The area of a trapezoid is A=(a+b)h over 2. If A=300, h=5, and b=30, what is the value of a?
1. 10
2. 39
3. 90
I appreciate you guys very much. Thanks
Click here to see answer by richwmiller(17219)

Question 254249: Could you please explain to me step by step how I would do
2/3 (x+8) + 3/5 = 1/5 (11-6x)
Click here to see answer by MRperkins(300)

Question 254258: -9=3+r
Click here to see answer by checkley77(12844)

Question 254169: 2(a-8)+7=5(a+2)-3a-19
Click here to see answer by JimboP1977(311)

Question 254333: Ok so i need help with pre-algebra equations. i Don't get them at all. for example how do you solve the equation: 2(3x+6)=7x or another one like, 2 x = 1
-
3
Click here to see answer by drk(1908)

Question 254360: please help me with this question:Y/2=12

Click here to see answer by stanbon(75887)

Question 254378: How do u solve the equation by finding square roots
Click here to see answer by scott8148(6628)

Question 254374: -3.4-(-7.6)=
Click here to see answer by richwmiller(17219)

Question 254440: five kids go buy sandwich. they each either had to choose between turkey and ham sandwiches. tha total cost was $17.50 and that was with a 25% tax and tip. how many of each kind of sandwich did they each get?
Click here to see answer by richwmiller(17219)

Question 254496: I am practicing for a college entrance test and need help with this question
a^2+n+2b^2=(a+b) (a+2b)
Thank you so much!
Here is what I tried:
a^2+n+2b^2=(a+b) (a+2b)
-a -a
a+n+2b^2= (b) (a+2b)
-2b -2b
a+n+b^2=(b)(a)
-a -a
n+b^2=b
-b -b
n+b=?
Looking at this now I see that this is completely incorrect...
-Britt
Click here to see answer by MRperkins(300)

Question 254497: I am studying for a college entrance exam and am stumped by this question. I tried to solve it in many different ways, and have worked on it over and over again but I still cannot find an answer that I am confident is correct. Any help would be greatly appreciated!
9x^2/144 - 4/25
I tried to make the fractions have the same denominator, then subtract, then reduce but that was incorrect.
Thanks!
-Britt
Click here to see answer by drk(1908)

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, 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, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 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