Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 126768: How do I come up with a comon denominator for this equation?
5/2r+1 - 3/2r-1 = 0
Click here to see answer by solver91311(17077)

Question 126855:

7x+y=20 3x+2y=18
Click here to see answer by checkley71(8403)

Question 126887: (2x-6)/21 divided by (5x-15)/12
Click here to see answer by edjones(7569)

Question 126886: Factor completely. 6x^2 + xy + 36x + 6y
Click here to see answer by edjones(7569)

Question 126889: m^5/5 divided by m^10/10. I am thinking to hard once again.
Click here to see answer by edjones(7569)

Question 126868: (y+7)^3+3=0
Click here to see answer by edjones(7569)

Question 126888: 1/(x-1)+3 = 4/(x-1) i know this is easy and I am thinking to hard.
Click here to see answer by josmiceli(9817)

Question 126902: Hi Can I have some help with a linear function is given?
g(x) = -7x + 8
(a) Find the average rate of change of the function between x = a and x = a + h.

(b) Find the slope of the line
Click here to see answer by stanbon(57967)

Question 126954: Solve the following equation for A : 2A/3 = 8 + 4A I got real confused on this problem i don't where to start.
Click here to see answer by josmiceli(9817)

Question 126972: If Joe makes $3.00 more in Overtime than regular time and if he were to work 5 hours straight time and 4 hours overtime what would be the straight time amount. The total he earned was $66.00.
I figured out that $6.00 was the straight time amount, but I can't figure out how to make an equation out of this? Can you help make an equation out of the word problem?
Carolyn
Click here to see answer by josmiceli(9817)

Question 126975: Hi I keep doing something wrong in this problem. Can you help me solve it? thanks
A function is given below. Determine the average rate of change of the function between x = -4 and x = 1.
h(t) = t^2 - 10t
Click here to see answer by solver91311(17077)

Question 126973: Sorry, I had the wrong email address typo....
If Joe makes $3.00 more in Overtime then regular time, and if he were to work 5 hours straight time and 4 hours overtime for a total of $66.00. What is the straight time amount.
I figured out the answer is $6.00, but do not know how to write in equation form. Can you help with this?
Carolyn
Click here to see answer by edjones(7569)

Question 127045: The demand and supply equations for a certain item are given by
D = –5p + 40
S = –p^2 + 30p – 8
Find the equilibrium price

Click here to see answer by checkley71(8403)

Question 127055: I do not understand this at all.
Try solving out system of equation with four variables. x + y + z + w = 0 x + y - z - w = 1; x - y + z + w = 3; x - y - z + w = -1.

Click here to see answer by stanbon(57967)

Question 127072: Solve the system by substitution
x+y=12
y=2x
y=12+x
Need to solve and graph, the second equation is confusing as to how it fits into the first equation.
Click here to see answer by jim_thompson5910(28715)

Question 127071: Graph f(x)=-x-2
I am not sure how to come to the solution in order to graph it.
Click here to see answer by jim_thompson5910(28715)

Question 127070: Rewrite the function 2x-3y=-6 as a function of x
3y=2x-6
f(x)=2/3+2
I think this is right. I need to show a graph to show my work. Are the coordinates (3,2), (1,2)? Graphing on Excel is confusing me.
Click here to see answer by jim_thompson5910(28715)

Question 127091:
Please help me solve this. Its not homework, just practice for my test.
2X+16-X+294+3X=117
Click here to see answer by checkley71(8403)

Question 127090: Please help me solve this. Its not homework, just practice for my test.
82+X/4=165
Click here to see answer by checkley71(8403)

Question 127095: Given f(x)=5xsquared-3x+1, find f(x-2)
I came up with x= -25
Click here to see answer by checkley71(8403)

Question 127094: Graph the inequality
2x+3y>6
I start out by changing it to
3y=2x+6
divide each side by 3 resulting in
y= 2/3x +2
are my coordinates (3,2) and (1,2) ?
Click here to see answer by josmiceli(9817)

Question 127093: Graph the inequality
y>=1
I do not understand how to begin this problem
Click here to see answer by solver91311(17077)

Question 127212: I need to express the following in the simplest form:
{a^2+6a-7} {2a^2+a-15} {a^2+5a-14}
-------- * --------- / ---------
{6a^2-7a-20} {a^2+2a-3} {3a^2-2a-8}
So far I have:
{(a+6)(a-1)} {3a+4}
---------- * -------- / ---------
{(a+3)(a-1)} {(a+7)}

Click here to see answer by stanbon(57967)

Question 127172: Can someone please help me solve this problem?
3-a-4/a+3=a^2-2/a+3
Thank you.
Click here to see answer by ankor@dixie-net.com(15746)

Question 127271:
i can't remember how to solve these help please
7 - 5x +8 + 2x + 4x - 3 = 2 + 3*5
Thanks
Click here to see answer by checkley71(8403)

Question 127341: Can you help me solve this problem Please.
David has fourteen thousand dollars to invest and he invest nine thousand in a mutual fund that pays twelve per cent annual simple interest. If he wants to make at least twenty two hundred dollars in yearly interest, at what minimum rate does the remainder of the money need to be invested? Thanks so much. Sharon
Click here to see answer by stanbon(57967)

Question 127328: Hi Can I have some help with this function?
A function f is given, and the indicated transformations are applied to its graph (in the given order) to obtain the function g. Write the equation for g.
f(x) = x^5; shift upward 8 units and shift 10 units to the left
g(x) =
Click here to see answer by stanbon(57967)

Question 127350: Graph f(x)=-2x+2
Click here to see answer by checkley71(8403)

Question 127395: I am sorry to be such a pain. I am scheduled to apply for tutoring tomorrow.
3-(6x+5)=3+(3x+4)
This is my work on it
3-6x-5=7+3x
-2-6x=7+3x
-2+2-6x=7+3x+2
-6x=9+3x
-6x-3x=9+3x-3x
-9x=9
-9x/-9=9/-9
x=-1
Is that right? If not can you see where I am going wrong?
Click here to see answer by jim_thompson5910(28715)

Question 127393: Can someone help solve:
t/10-t/25=1/10
Thank you.
Click here to see answer by jim_thompson5910(28715)

Question 127397: Can someone please help. I am confused.
x/x+8-8/x-8=x^2+64/x^-64
Click here to see answer by jim_thompson5910(28715)

Question 127401: Please help.
z^2-64/z divided by z-8/z+1
Click here to see answer by jim_thompson5910(28715)

Question 127416: find an equation of the line containing the point (5,-1) and perpendicular to the line 5x-2y=10.
Click here to see answer by jim_thompson5910(28715)

Question 127414: FIND AN EQUATION OF THE LINE CONTAINING THE POINT (-4,3) AND PARALLEL TO THE LINE 5x-3y=12.
Click here to see answer by jim_thompson5910(28715)

Question 127406: sally has f bags of lego in each are 22 blocks .sam has 9 lego blocks spare so gives them to sally.expression for numer of blocks sally has.sally has 119 blocks.form an equation solve the equaation find the number of lego bags sally has
Click here to see answer by ankor@dixie-net.com(15746)

Question 127423: Hey i have a problem i can't solve this question can you help me. it's solving w.
w/w-1=3/w+1+1
Click here to see answer by stanbon(57967)

Question 127409: Can someone please help me solve this problem?
q+9/2 + q-3/3=6
Thank you.
Click here to see answer by ankor@dixie-net.com(15746)

Question 127498: x+4y=-8
Click here to see answer by checkley71(8403)

Question 127522: Hi Can I have some help with this problem?
Sketch the graph of the given parabola and state the coordinates of its vertex and its intercepts.
y=2x^2 + x-6
Click here to see answer by josmiceli(9817)

Question 127458: I am a little confused, can someone help me?
LCM of 3(y-7)and 21(y-7)
Click here to see answer by edjones(7569)

Question 127633: I am trying to solve for x.
Jane's purchased one item at a drug store, and the total with tax is 20.30. What is the cost of the item without tax?
I wrote the following problem.

Click here to see answer by checkley71(8403)

Question 127659: A small company produces both bouquets and wreaths of dried flowers. The bouquets take 1 hour of labor to produce, and the wreaths take 2 hours. The labor available is limited to 80 hours per week, and the total production capacity is 60 items per week. Write a system of inequalities representing this situation, where x is the number of bouquets and y is the number of wreaths. Then graph the system of inequalities.
So far I have come up with
x+y<=60 and x+2y<=80
x>40
Y>20
With these numbers I am not sure how to graph them.
y<=-x+60
y<=x/2 +40
I have confused myself, not sure which way to go.
Click here to see answer by stanbon(57967)

Question 127711: Hi can I have some help concerning functions?
A quadratic function is given.
f(x) = x^2 - 9x
(a) Express the quadratic function in standard form.
f(x) = a(x - h)^2 + k where
a =
h =
k =
Click here to see answer by scott8148(6628)

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