Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 1077337: how do I evaluate -3/4^2 and write my answer as a fraction?

Click here to see answer by MathLover1(20849)

Question 1077337: how do I evaluate -3/4^2 and write my answer as a fraction?

Click here to see answer by MathTherapy(10552)

Question 1077337: how do I evaluate -3/4^2 and write my answer as a fraction?

Click here to see answer by ikleyn(52781)

Question 1077337: how do I evaluate -3/4^2 and write my answer as a fraction?

Click here to see answer by Alan3354(69443)

Question 1077428: Solve the equation 5x+5=0
Click here to see answer by Alan3354(69443)

Question 1077419: The quotient of 8 more than a number and 3 is 12
Click here to see answer by MathLover1(20849)

Question 1077440: 2y=3x+4
Y=2x+1

Click here to see answer by Boreal(15235)

Question 1077447: Hi!
if x=53.33 and it represents 45% of a total mark of a course, and Y (final exam) is 55% of it, how much should Y be if the total needs to be 70% or more?
I am trying to calculate the needed mark for a course final exam.
Thank you!!!

Click here to see answer by srinivas.g(540)

Question 1077325: Mark can harvest the crops in 9 days. His father needs 15 days to complete the same task. If Mark works on the first day, his father works on the second day, Marks works again on the third day, his father works on the fourth day, and so on, how many days does it take to harvest 4/5 of the crops?
Click here to see answer by jorel1380(3719)

Question 1077324: if f(x) varies directly with x, and f(x)=12 when x=-16 find the value of f(x) when x=20
Click here to see answer by josgarithmetic(39617)

Question 1077473: Mark can harvest the crops in 9 days. His father needs 15 hours to complete the same task. If Mark works on the first day, his father works on the second day, Marks works again on the third day, his father works on the fourth day, and so on, how many days does it take to harvest 4/5 of the crops?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1077452: Simplify: (a^2-8a)/(2a^2+5a-3)*(2a-1)/(a^2+2a+4)*(a+3)/(a^2-2a)
Click here to see answer by Edwin McCravy(20055)

Question 1077513: 2x^(2)+1=37
Click here to see answer by math_helper(2461)

Question 1077552: Given the two functions below, what is the y-intercept of g(x)?

f(x) = 10x
g(x) = f(�x)
Click here to see answer by Alan3354(69443)

Question 1077561: Which of these is the composite function f(g(x))?

f(x) = x^2 � 5
g(x) = 9x � 2
f(g(x)) = 81x^2 � 18x � 9
f(g(x)) = 9x^2 � 1
f(g(x)) = 81x^2 � 36x � 1
f(g(x)) = 9x^2 � 9

Click here to see answer by josgarithmetic(39617)

Question 1077556: Given f(x) = x^2 � 4x � 2 and g(x) = 2x^2 + 4x + 9, find (f � g)(x).
Click here to see answer by josgarithmetic(39617)

Question 1077554: Given the two functions below, what is the x-intercept of g(x)?

f(x) = x + 14
g(x) = f(-x)
Click here to see answer by themasterofcircuits(27)

Question 1077632: How to write a rational function by given asymptote
Vertical x=0 x=4
Horizontal y=0
Click here to see answer by josgarithmetic(39617)

Question 1077659: Write your own quadratic equation and graph it in your journal. (2 points per feature of the graph and 2 points for an accurate graph)
Write the quadratic equation: _________________________________
Name the roots or solutions of your quadratic equation _________________________________
Vertex of your quadratic equation
_________________________________
Axis of symmetry of your quadratic equation
_________________________________
Submit the graph along with your answers.

Click here to see answer by Boreal(15235)

Question 1077670: Lisa has two younger brothers. One brother is half her age and one is two years younger than she is. If you add all their ages together, the total is 28. Which of the following equations could you see to find age (x)?
Click here to see answer by ikleyn(52781)

Question 1077719: A person's website specializes in the sale of rare or unusual vegetable seeds. He sells packets of sweet-pepper seeds for $2.16 each and packets of hot-pepper seeds for $4.40 each. He also offers a 16-packet mixed pepper assortment combining packets of both types of seeds at $2.58 per packet. How many packets of each type of seed are in the assortment?
Click here to see answer by addingup(3677)

Question 1077754: what is the actual algebraic formula for determining the hypotenuse of a
right angle?

Click here to see answer by ikleyn(52781)

Question 1077802: Write the equation of a circle with center (4, 2) and radius r = 7.
(x � 2)^2 + (y � 4)^2 = 49
(x � 4)^2 + (y � 2)^2 = 49
(x + 4)^2 + (y + 2)^2 = 49
(x + 2)^2 + (y + 4)^2 = 49

Click here to see answer by ikleyn(52781)

Question 1077803: What is the slope of the line that is tangent to the circle x2 + y2 = 169 at point (5, -12)?
-1/13
-5/12
5/12
13 or 13/1

Click here to see answer by ikleyn(52781)

Question 1077805: Write the equation of the circle with center (5, 1) and radius r = 10. Use the ^ key for the exponents.

Write your answer as the example: (x-4)^2+(y+8)^2=25
Click here to see answer by ikleyn(52781)

Question 1077804: Write the equation of the circle with center (-6, -4) and containing the point (-2, -1). Use the ^ key for the exponents.

Write your answer as the example: (x-2)^2+(y+4)^2=64
Click here to see answer by MathLover1(20849)

Question 1077801: Write the equation of the line that is tangent to the circle x2 + y2 = 100 at the point (8, 6).
y=4/3x+25
y=3/4x−25/2
y=−4x+50
y=−4/3x+50/3
Click here to see answer by josgarithmetic(39617)

Question 1077799: Write the equation of the circle with center (-4, 11) and containing the point (5, -1). Use the ^ key for the exponents.

Write your answer as the example: (x+2)^2+(y-5)^2=49
Click here to see answer by josgarithmetic(39617)

Question 1077797: What is the radius of a circle centered at (3, -1) and passing through the point (5, 7)?
Click here to see answer by josgarithmetic(39617)

Question 1077800: Write the equation of the line that is tangent to the circle (x � 2)2 + (y � 4)2 = 289, at the point (-15, 4).
x = -15
x = 4
y = 4
y = -15
Click here to see answer by MathLover1(20849)

Question 1077798: Write the equation of the circle with center (-1, 9) and containing the point (2, 5). Use the ^ key for the exponents.

Write your answer like this: (x+3)^2+(y-8)^2=49
Click here to see answer by math_helper(2461)

Question 1077930: Which of the points (0, -7) (2,3) (1,8) (3,1) is a solution of the equation y = -2x + 7
Click here to see answer by josgarithmetic(39617)

Question 1077930: Which of the points (0, -7) (2,3) (1,8) (3,1) is a solution of the equation y = -2x + 7
Click here to see answer by MathLover1(20849)

Question 1077932: A rectangle has the width x and its length is 10 greater than the
width. For what values of x the area of the rectangle is greater or equal
to 24. Make sure that you show all your calculations in order to get full
credit.
Click here to see answer by jorel1380(3719)

Question 1077945: Find the constant sum for an ellipse with foci F1 (3, 0), F2 (24, 0) and the point on the ellipse (9, 8). The constant sum is: _____. Enter only a number.
Click here to see answer by MathLover1(20849)

Question 1077956: Writing the equation of a circle, given the center and the radius; OR writing the equation, given the center and a point on the circle. Choose the one you believe is easier and explain why. Also, give examples to support your point of view. How can you tell from the equation of a circle whether or not a given point lies in the interior of the circle?
Click here to see answer by josgarithmetic(39617)

Question 1078025: solve the following systems of equations. Be sure to find the point(x,y) where they would meet if they do. 1/3x + 1/2y = o
1/2x + 1/5y = 11/5
Click here to see answer by Fombitz(32388)

Question 1078085: 5th;(x-y)^10
Find the 5th term
Click here to see answer by ikleyn(52781)

Question 1078283: Here is the equation for a hyperbola. Where is the location of one of the vertices?

Type your answer as one ordered pair, like this: (-2, 0)
Either one of the vertices will count as a right answer.
x^2/49 - y^2/4 = 1
Click here to see answer by Boreal(15235)

Question 1078301: Brett is Robbbie's older brother. The sum of their ages is 39. The difference of the ages is 9. How old are Brett And Robbie?
Click here to see answer by ikleyn(52781)

Question 1078340: X^2-2kx-8k^2
Find in terms of k, the least value for c for which the equation f(x)=c has a real solution for x.
Wth is this?
Thanks for the help
Click here to see answer by htmentor(1343)

Question 1078441: It takes two minutes to print out three color photos on Erin's printer. Right in equation relating the number of color photos P to the number of minutes M. Show your work
Click here to see answer by josmiceli(19441)

Question 1078440: The sum of two numbers is 18. Twice the smaller number decreased by three equals the larger number. What are the two numbers? Show your work
Click here to see answer by MathLover1(20849)

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