Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 404118: what is the solution set for 2x squared plus 8x=0?
Click here to see answer by stanbon(57332)

Question 404115: given: u = √(xy)
solve: [(du/dx)/(du/dy)]
Click here to see answer by richard1234(5390)

Question 404132: Please help :)
given: u = sqrt(x^2+y^2)
solve: [(du/dx)/(du/dy)]
Click here to see answer by stanbon(57332)

Question 404148: I need some help please :)
solve: du/dx = x/y
and/or solve: du/dx = y/x

Click here to see answer by richard1234(5390)

Question 404280: Find the integers. Write them in numerical order from least to greatest, separated with commas and NO spaces.
The sum of four consecutive integers is -22.
Click here to see answer by stanbon(57332)

Question 404277: Explain how to solve the following equation. Make sure you check your answer.
3(9 + 4a) - 19 = 32
Click here to see answer by rfer(12657)

Question 404305: 7(5x+4)-6=11x-2
Click here to see answer by jim_thompson5910(28593)

Question 404380: I am trying to solve an equation with fractions. This is the problem
2x over x^2+6x+8 = x over x+4 minus 2 over x+2
(i hope the way i wrote it is not confusing. i'm sorry!)
I have gotten this far. 2x=x^2+2x-2x+4
2x=x^2+4
I can't get any further. I know that it has to be factored again but i am confused. It is not the type of equation that you have to set = to 0. I can do any of the other problems like this but i have never had one end up with an x^2 right there and my teacher told us that when we got to that point we would have to factor it again but i'm not sure if i understand the problem. I also wasn't sure if the 2x-2x was 0 or 1x. Please help me with this problem if you don't mind. Thank you!
Click here to see answer by stanbon(57332)

Question 404390: My son recently took a test an had the following question wrong:
3x^2 - 4 = 0 That's 3 "x" squared. He was require to provide the solution and the correct answer is: +/- 2 times the square root of 3 divided by 3
How does one come upon that answer? He is having difficulty trying to find out how to begin
Click here to see answer by stanbon(57332)

Question 404421: hello, i have a quiz coming up and i need help :) please SHOW work and EXPLAIN how to do the problem :
-3/5 + -3/4 - 7/8
Click here to see answer by rfer(12657)

Question 404467: I need help on how to work this problem. "jane spent 15 days on the road in february because her january sales amount was $70,000. If her July sales amount is $55,000 then how many days would she spend on the road in August?"
Click here to see answer by unlockmath(1599)

Question 404451: 40=-8(x-3)
Click here to see answer by anomis(18)

Question 404495: 6751 in scientific notation

Click here to see answer by rfer(12657)

Question 404490: Solve the equation. 2x - 4 = -10
Click here to see answer by rfer(12657)

Question 404412: The number of gallons of water remaining in a pool t hours after it begun to drain is illustrated in the table.
Hours, t _________ Number of gal. of water
0 _________ 20,000
5 _________ 16,500
10 _________ 13,000
15 _________ 9,500
20 _________ 6,000
a. Find a liner model for this data.
b. How many gallons of water will remain in the pool after 26 hours?
Click here to see answer by ankor@dixie-net.com(15649)

Question 404549: Charlie is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices.
Company A charges $127 and allows unlimited mileage.
Company B has an initial fee of $55.00 and charges an additional $0.90 for every mile driven.
For what mileages will Company A charge at least as much as Company B? Use m for the number of miles driven, and solve your inequality for m .
my answer-please check me
a=127
b=55+.9m
127=55+.9m
72=.9m
m=80
I'm not sure if the answer should be m>=80 or m<=80

Click here to see answer by stanbon(57332)

Question 404553: Use the remainder theorem to findvP(-2) for P(x)=2x^4+4x^3-5x^2+4.

Specifically, give the quotient and the remainder for the associated division and the value of P(-2).
Quotient=
Remainder=
P(-2)=
Click here to see answer by stanbon(57332)

Question 404561: Divide:
(-8y^7x+15y^7x^6)/(-2y^2x^5)

I got -y^5(15x^5-18)/2x^4
Is that right?

Click here to see answer by MathLover1(6628)

Question 404607: First, thank you so much for taking time to read my question. :)
Well, I am working on a project for school and I am not sure how to set up an equation. I need a little help because my book doesn't include a very helpful example and the rest of the HW relies on this 1st question.
That said, here's the question,
Write an equation for the aircraft that gives you the distance y that the aircraft will travel in x hours.
The aircraft is cruising at 504 (mi/h).
---
I tried to use y= (504) x but I quickly slapped myself in the head because that won't help me find the distance (or so I think). I also tried a linear equation but it still didn't seem right... Am I missing something? Could you please help me out or show me another example of an equation like this.
Thanks in advance,
Alli ♥
Click here to see answer by stanbon(57332)

Question 404674: 3c-5d=c+2 solve for c.
Click here to see answer by rfer(12657)

Question 404753: find the slope intercept form of the equation of the line that passs thought (-1,5)and is parallel to 4x+2y=8
Click here to see answer by MathLover1(6628)

Question 404794: Simplify the expression.
9X + 8y/ 12
I'm pretty sure it would be 3x/4 + 4x/3 but I'm not totally sure.
Thanks so much for your help!
Click here to see answer by stanbon(57332)

Question 404794: Simplify the expression.
9X + 8y/ 12
I'm pretty sure it would be 3x/4 + 4x/3 but I'm not totally sure.
Thanks so much for your help!
Click here to see answer by richard1234(5390)

Question 404859: Write an equation for the relation shown in each chart.
x=-3,-2,-1,0,1,2,3
y=4,4,4,4,4,4,4
Click here to see answer by algebra help tutor(6)

Question 404839: x:27=8:2
Click here to see answer by rfer(12657)

Question 404897: You need to find t.
-38 + 26t = 2t + 24t - 53 - 72
I've tried it a million times and asked everyone but I still can't find the right answer
Please help
Thanks
Click here to see answer by Tatiana_Stebko(1326)

Question 404900: A car dealer wants to make a profit of $925 on the sale of a car that cost the dealer $12,600. Use the equation P=s-c, where p is the profit on an item, s is the selling price, and c is the cost, to find the selling price of the car.
Click here to see answer by anomis(18)

Question 405068: Are the lines -7x - 8y = 0 and -7x - 8y = -3 parallel or perpendicular?

Click here to see answer by Alan3354(30993)

Question 405067: solve equation: x/3= 3x - 2
Click here to see answer by rfer(12657)

Question 405088: i dont understand algerbra how it work i relly need help
Click here to see answer by richard1234(5390)

Question 405016: solve each equation below. show all steps of each solution.
2y-7=15
Click here to see answer by richard1234(5390)

Question 405203: please help
solve using elimination method
3r-5s=-15
5r+3s=43
Click here to see answer by stanbon(57332)

Question 405203: please help
solve using elimination method
3r-5s=-15
5r+3s=43
Click here to see answer by MathLover1(6628)

Question 405291: solve using multiplication method
-2x>1/9
what is the solution set
Click here to see answer by stanbon(57332)

Question 405314: please solve using the multiplication method
-3/4x=-5/6
type answer as an integer or fraction
Click here to see answer by stanbon(57332)

Question 405365: the amount (A) on deposit in a bank account bearing simple interest is given by the formula
A=P+PRT
find A when P=$1200
R=0.08
T=3
Click here to see answer by robertb(4012)

Question 405518: The yard is 2 1/4 times as long as it is wide. Find the equation in length, in feet, of the fence that goes all the way around the yard if it measures the width as w feet? The yard is a Rectangular and the length is 2 1/4 long.
Thanks
Click here to see answer by ewatrrr(10682)

Question 405527: find an equation of the line that satisfies the given conditions:
y-intercept 6; parallel to the line 2x+3y+4=0

i found the slope=-2/3 but what do i do with the y-intercept?
Click here to see answer by ewatrrr(10682)

Question 405544: 2.1x+42=5.2x-20
I'm not sure how to do these kind of problems. Any help at all would be greatly appreciated
Click here to see answer by jim_thompson5910(28593)

Question 405834: Hello,
I need some help because I don't get what I am doing wrong. Here is the problem.
Find an equation of the line containing the given pair of points.
(-5,-9)(-1,-8)
The equation of the line in slope-intercept form is y=4/4x-33/4 (this is my answer)
The answer given is 1/4x-31/4.
Why? I don't get how they get 31/4.
Please help soon.
Sincerely
Demi
Click here to see answer by stanbon(57332)

Question 405838: der. instant rate of change
9x^2+4x-13... x=-7 f^1(-7) find the slope of the tangent
i don't understand what the question is asking.
Click here to see answer by stanbon(57332)

Question 405840: Here is another one. Find an equation of the line having the given slope and containing the given point. m=4/5, (8, -8)
The answer to the equation of the line is y= 4/5x-72/5. I did not get this answer and I don't know how they did. What am I missing?
My answer was y=4/5x-40/5
Thank you for your assistance,
Demi
Click here to see answer by stanbon(57332)

Question 405841: Here is another one. Find an equation of the line containing the given pair of points. (1/4,-1/2) and (3/4,1)
The answer to the equation of the line is y= 3x-5/4. I did not get this answer and I don't know how they did. What am I missing?
My answer was y=3x-3/4.
Thank you for your assistance,
Demi
Click here to see answer by rfer(12657)

Question 405601: A number increased by 2/3 of the number is 35. What is the number?
Click here to see answer by ankor@dixie-net.com(15649)

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, 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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