Questions on Algebra: Equations answered by real tutors!

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Question 126328: We are working on Rational Expressions and I am really confused. Can someone please help me with this crazy problem.
x^2-4/x^2-x-6 / (x^2-x-2/x^2-8x+15*x^2-3x-10/x^2+3x+2)
I have no idea where to start and the whole factoring thing has got confused! Thanks so much for the help!
Click here to see answer by stanbon(75887)

Question 126341: Hi Can I have some help with finding this function?
Find a function whose graph is the bottom half of the circle x^2 + y^2 = 25.
f(x) =
Click here to see answer by solver91311(24713)

Question 126356: Can you help me? I need to solve for y. The equation is 8/5y-2/3y=23-1/15y. I dont know how to do this...
Click here to see answer by solver91311(24713)

Question 126374: In a collection of dimes and quarters, there are seven more quarters than dimes. How many dimes and quarters are there if the collection is worth $3.50?
What is the equation for this?
Click here to see answer by solver91311(24713)

Question 126430: -2m+4=29-7m
Click here to see answer by apachemexican1(64)

Question 126429: -2m+4=29-7m
Click here to see answer by JessicaGill(40)

Question 126554:
1/2x + 1/4y = 4, solve for y
Click here to see answer by checkley71(8403)

Question 126556: one angle of a triangle has a measure that is 10 more than twice that of the second angle. the third angle has a measure 10 less than the first. find the measure of each angle of the triangle
Click here to see answer by checkley71(8403)

Question 126555: a student with a 1.875 gpa has 24 credit hours. find how many credit hours of b's (at 3 per credit hour) he will need to raise his gpa to a 2.40
Click here to see answer by ankor@dixie-net.com(22740)

Question 126618: I need to solve for C. Here is the equation:
9(2c + 5) + 3c = -75
Here is what I have done so far.
9 . 2c + 9.5 + 3c = -75
18c + 45 + 3c = -75
21c + 45 = -75
21c + 45 -45 = -75 + -75
I don't know where to go from here.
18c+45+3c=-75
- 3c -3c=-75
15c+45=-75
-45=-45
15c =-120
15 = 15 divide
c= -8
Click here to see answer by sable2you(1)

Question 126628: how do I solve for Y with 3x-2y=6?
Click here to see answer by solver91311(24713)

Question 126644: tan(11)=51/b How do i get b by itself?
Click here to see answer by ilana(307)

Question 126644: tan(11)=51/b How do i get b by itself?
Click here to see answer by marcsam823(57)

Question 126715: 3x-y<(less than/or equal to)6
x>(greater than or equal to)1
y(less than or equal to)3
changing the signs to equal signs I get
3x-y=6
y=6+3x
the two other equations confuse me as to where I go now
Click here to see answer by stanbon(75887)

Question 126766: Hi I'm having some trouble finishing this problem, can you help me? thanks
Between 1980 and 2000, a rare book collector purchased books for his collection at the rate of 46 books per year. Use this information to complete the following table. (Note that not every year is given in the table.)
Year Number of books
1980 450
1981 496
1982 542
1985 680
1990 910
1992 1002
1995 1140
1997 1232
1998 1278
1999 1324
2000 1370
Click here to see answer by checkley71(8403)

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(24713)

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(8007)

Question 126886: Factor completely. 6x^2 + xy + 36x + 6y
Click here to see answer by edjones(8007)

Question 126889: m^5/5 divided by m^10/10. I am thinking to hard once again.
Click here to see answer by edjones(8007)

Question 126868: (y+7)^3+3=0
Click here to see answer by edjones(8007)

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(19441)

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(75887)

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(19441)

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(19441)

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(24713)

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(8007)

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(75887)

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(35256)

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(35256)

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(35256)

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(19441)

Question 127093: Graph the inequality
y>=1
I do not understand how to begin this problem
Click here to see answer by solver91311(24713)

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(75887)

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(22740)

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(75887)

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(75887)

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(35256)

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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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