Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 107508: You fill your car's gas tank when it is about 1/2 empty. The next week, you fill the tank a second time when it is about 3/4 empty. If you buy a total of 18 1/2 gallons of gas on these two days, about how many gallons does that tank hold?
Click here to see answer by stanbon(57979)

Question 107544: Okay I have this word problem:
A collection of 40 dimes and nickels is worth $2.90. How many nickels are there?
I came up with this equation:
(d=dimes)
0.1d+0.05(40-d)=2.9
I got an incorrect answer according to the answer in the back of the textbook, and according to the equation solver on this site, neither of the other answers were correct. Help me!
Click here to see answer by ankor@dixie-net.com(15746)

Question 107552: Here is the equation that I can not solve.
x =3/10
y= 1/2
2/5x^3y^2 + 1/3x^2y^2 + 3/5x^3y^2 + 1/10x^3y^2 +x^2y^2 + 4 +2xy + xy + 5 =
First I grouped the ones alike
4+5=9
2/5x^3Y^2 + 3/5x^3y^2 + 1/10x^3y^2
1/3x^2y^2 + x^2y^2
2xy + xy
I do not know where to go know.
Please help me.
Click here to see answer by stanbon(57979)

Question 107545: Okay I have this word problem:
A collection of 40 dimes and nickels is worth $2.90. How many nickels are there?
I came up with this equation:
(d=dimes)
0.1d+0.05(40-d)=2.9
I got an incorrect answer according to the answer in the back of the textbook, and according to the equation solver on this site, neither of the other answers were correct. Help me!
Click here to see answer by stanbon(57979)

Question 107563: pls advise how to solve this:
a ladder 10 ft. long is leaning against a building. how high on the building will the ladder be when the bottom of the ladder is 6ft from the building?

Click here to see answer by stanbon(57979)

Question 107591: Tell wether the number is prime or composite,if it is composite write prime factorization.
4.97
Any help with this problem would be GREATLY appreciated.
Click here to see answer by stanbon(57979)

Question 107594: Tell wether the number is prime or composite,if it is composite write prime factorization.
5. 132
Any help wit this problem would be GREATLY appreciated:)
Click here to see answer by stanbon(57979)

Question 107595: Tell wether the number is prime or composite,if it is composite write prime factorization.
6. 114
Any help with this problem would be GREATLY appreciated:)
Click here to see answer by scott8148(6628)

Question 107597: Tell wether the number is prime or composite,if it is composite write prime factorization.
8. 345
Any help with this problem would be GREATLY appreciated:)
Click here to see answer by scott8148(6628)

Question 107603: Find the number of Calories in an orange and in a peach.
1. An orange has 30 Calories more than a peach.
2. Thirteen peaches have as many Calories as 7 oranges.
Click here to see answer by solver91311(17077)

Question 107635: Suppose a cost-benefit model is given by:

Where y is the cost for removing x percent of a given pollutant. what percentage of pollutant can be removed for $23,000.00?
Click here to see answer by solver91311(17077)

Question 107634: Determine whether the equation is an identity, a conditional equation, or an inconsistant equation.
1/(x+5) + 2/(x+3) = -2/(x^2 + 8x +15)
Click here to see answer by Fombitz(13828)

Question 107637: find all the values of x satisfying the given conditions
1 2 -4
y1= --- , ----, ---------, and y1+y2=y3
x+7 x+3 x^2+10+21

Click here to see answer by solver91311(17077)

Question 107644: PLease help me solve: -1/3 - 5/4y= 3/4 - 1/6y
Click here to see answer by jim_thompson5910(28717)

Question 107660: determine whether the equation is an identity, a conditional equation, or an inconsistent equation.
2x-3+9x-4 = 3x+8x-10
Click here to see answer by jim_thompson5910(28717)

Question 107660: determine whether the equation is an identity, a conditional equation, or an inconsistent equation.
2x-3+9x-4 = 3x+8x-10
Click here to see answer by stanbon(57979)

Question 107661: determine whether the equation is an identity, a conditional equation or an inconsistent equation.
-4(x+6)+6=2x-6(x+7)
Click here to see answer by jim_thompson5910(28717)

Question 107661: determine whether the equation is an identity, a conditional equation or an inconsistent equation.
-4(x+6)+6=2x-6(x+7)
Click here to see answer by stanbon(57979)

Question 107640: write the value(s) that make the denominator(s) zero, then solve the equation.
x-6 x+8
--- + 2 = ---
3x x
Click here to see answer by stanbon(57979)

Question 107622: Find the number of Calories in a stalk of celery and in a carrot.
1. A carrot has 13 Calories more than a celery stalk.
2. Five carrots and ten celery stalks have only 170 Calories.

Click here to see answer by scott8148(6628)

Question 107673: –3(10x – 3) + 10(3x – 3) = x – 7
Click here to see answer by jim_thompson5910(28717)

Question 107710: I need help with pre-algebraand algebra i think it will help me if I had example problems.I have touble remembering formulas.I am trying to get into a selective enrollment highschool, and i am barely getting by in math.Please help me.
Click here to see answer by anne(47)

Question 107725: if every fourth trick- or- treater is a vampire, and every 6th a robot , how many of each will you see if 75 trick- or- treaters come to your door?
i need the steps on how u solve this problem.
THANK YOU:)
Click here to see answer by edjones(7569)

Question 107781: Find two consecutive odd integers such that 5 times the first integer is 12 more than 3 times the second.
Click here to see answer by checkley71(8403)

Question 107786: hey everyone i jus have a really quick question its probably so simple but for whatever reason im jus not gettin it here it is:
T= 0.0848*a/(0.47)^2
T=0.3839 a__________(3)
All i wana know is where did 0.3839 come from i no "a" still remains in the formula and we are jus simplifying the expression if some one could show me stepwise how they simplified that to get 0.3839a greatly appriciate it
thankz
Click here to see answer by josmiceli(9817)

Question 107826: Please help me solve this problem into an equation
Click here to see answer by MathLover1(6812)

Question 107826: Please help me solve this problem into an equation
Click here to see answer by jim_thompson5910(28717)

Question 107828: please help me answer this problem into an equation
Click here to see answer by MathLover1(6812)

Question 107865: x-11=5
and
0=x-7
Click here to see answer by checkley71(8403)

Question 107986: Tell wether the number is prime or composite. If it is composite,write its prime factorization.
5. 132
Any help with this equation would be greatly appreciated.
Click here to see answer by jim_thompson5910(28717)

Question 108019: Write the fraction in simplest form.
17. 7/21
Any help with this equation would be GREATLY appreciated.
Click here to see answer by MathLover1(6812)

Question 108017: Write the fraction in simplest form.
17. 7/21
Any help with this equation would be GREATLY appreciated.
Click here to see answer by stanbon(57979)

Question 107997: Tell wether the number is prime or composite. If it is composite,write its prime factorization.
8. 345

Any help with this equation would be GREATLY appreciated.
Click here to see answer by solver91311(17077)

Question 108035: An open cylindrical garbage container has a surface are of 1500cm^2(squared) and a radius of 12cm. What is its height to the nearest tenth of a centimetre?
Click here to see answer by checkley71(8403)

Question 108030: Write the equations in standard form of the horizontal and vertical lines that pass through the point.
1. (-5,-7)
2. (6,-10)
Click here to see answer by checkley71(8403)

Question 108028: Oats 'n' Barely bulk food store sells cashews at $18/kg and peanuts at $6/kg. If the store wants to make a mixture of 50kg of cashews and peanuts to sell for $9/kg, how many kilograms of cashews and how many kilograms of peanuts must be in the mixture?
Click here to see answer by checkley71(8403)

Question 108026: Write the fraction in simplest form.
20. 6/120
Any help with this equation would be GREATLY appreciated.
Click here to see answer by checkley71(8403)

Question 108024: Write the fraction in simplest form.
19. 14/4
Any help with this equation would be GREATLY appreciated.
Click here to see answer by edjones(7569)

Question 108023: Write the fraction in simplest form.
18. 24/18
Any help with this equation would be GREATLY appreciated.
Click here to see answer by edjones(7569)

Question 108021: Write the fraction in simplest form.
18. 24/18
Any help with this equation would be GREATLY appreciated.
Click here to see answer by HyperBrain(694)

Question 107989: Tell wether the number is prime or composite. If it is composite,write its prime factorization.
7.163
Any help with this equation would be GREATLY appreciated.
Click here to see answer by HyperBrain(694)

Question 108011: Find the greatest common factor of the numbers or monomials.

6/14
Any help with this equation would be GREATLY appreciated.
Click here to see answer by HyperBrain(694)

Question 108010: Find the greatest common factor of the numbers or monomials.

14. 5/7
Any help with this equation would be GREATLY appreciated.
Click here to see answer by HyperBrain(694)

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