Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

Tutors Answer Your Questions about Linear-equations (FREE)

Question 258173: please help me solve this equation: 4x+y=8
Click here to see answer by stanbon(75887)

Question 258163: Write the equation of the line that has a slope of -5 and passes through the point (-1,4).
Click here to see answer by palanisamy(496)

Question 258215: Archaeologists and forensic scientists use the length of human bones to estimate the height of individuals. A person�s height, h, in centimeters, can be determined from the length of the femur, f (the bone from the knee to the hip socket), in centimeters, using the following formulas:
Man: h = 69.089 + 2.238f
Woman: h= 61.412 + 2.317f
A partial skeleton of a man if found. The femur measures 50 centimeters. How tall was the man?
What is the length of the femur for a woman who is 150 centimeters tall?
Click here to see answer by stanbon(75887)

Question 258246: One of the more familiar late-evening sounds during the summer is the rhythmic chirping of a male cricket. Of particular interest is the snowy tree cricket, sometimes called the temperature cricket. It is very sensitive to temperature, speeding up or slowing down its chirping as the temperature rises or falls. The chart to the right shows how the number of chirps per minute of the snowy tree cricket is related to temperature.
Timely Noise
t, Temperature
(�F) N(t), Number of
Chirps/Minute
55 60
60 80
65 100
70 120
75 140
80 160
Crickets are usually silent when the temperature falls below 55�F. What is a possible practical domain for the snowy tree cricket function?
Determine the average rate of change of the number of chirps per minute with respect to temperature as the temperature increases from 55�F to 60�F.
How does the average rate of change determined in part b compare with the average rate of change as the temperature increases from 65�F to 80�F.
Click here to see answer by stanbon(75887)

Question 258256: find the slope of
2x-4y=1

Click here to see answer by rfer(16322)

Question 258322: please help i don't understand how to make the equations like this:
write an equation of the line containing the given point and parallel to the given line (2,-4);9x-5y=6
Click here to see answer by Theo(13342)

Question 258351: x+4y=16
Click here to see answer by richwmiller(17219)

Question 258350: In a lab experiment 9 grams of acid were produced in 34 minutes and 19 grams in 43 minutes. Let g be the number of grams and m be the number of minutes. Find a linear equation that you could use to calculate g for any number of minutes?
Click here to see answer by richwmiller(17219)

Question 258363: Part of $8,000 was invested at 10% interest and the rest at 12%. If the annual income from these investments was $850, how much was invested at each rate? Could someone help me with this problem?
Thank you.
Click here to see answer by richwmiller(17219)

Question 258368: Part of $10,000 was invested at 6% interest and the rest at 7.5%. If the annual income from these investments was $712.50, how much was invested at each rate?
Can you show me in steps, so I will know how to solve? I would appreciate it. I need to know how to solve.
Thank you.
Click here to see answer by richwmiller(17219)

Question 258323: write an equation of the line containing the given point and parallel to the given line. (2,-4); 9x-5y=6
Click here to see answer by Fombitz(32388)

Question 258418: A printer has two presses. One has a setup cost of $210 and can print the pages of a certain book for $5.69. The other press has a setup cost of $350 and can print the pages of the same book for $5.31. Find the break point.
Could someone help me, please?
Thank you.
Click here to see answer by richwmiller(17219)

Question 258421: Find the slope and y intercept of th eline described
5x - y = 6
Click here to see answer by rfer(16322)

Question 258475: help me solve 2x-5=2x+y
Click here to see answer by Alan3354(69443)

Question 258517: I don't understand slopes and it seems difficult and i just don't understand it, please help!!
Lynn
Click here to see answer by alyssab92(4)

Question 258517: I don't understand slopes and it seems difficult and i just don't understand it, please help!!
Lynn
Click here to see answer by richwmiller(17219)

Question 258664: Solve for y.
I tried this:

Click here to see answer by Edwin McCravy(20055)

Question 258671: 2x=y-8 what is the x axis
Click here to see answer by Alan3354(69443)

Question 258688: find the equation of slope2; (0,3)

Click here to see answer by unlockmath(1688)

Question 258714: A student has earned scores of 87, 81, and 88 on the first 3 of 4 tests. If the student wants an average (arithmetic mean) of exactly 87, what score must she earn on the fourth test?
A. 85
B. 86
C. 87
D. 92
E. 93
Click here to see answer by vksarvepalli(154)

Question 258697: Divide:
Click here to see answer by Fombitz(32388)

Question 258768: Describe the transformation from the graph of f(x)=4x to the graph of g(x)1/2x
Click here to see answer by stanbon(75887)

Question 258796: Solve the system of linear equations.
x/4 - y/11 = -9/44
x/6 - y/13 = -1/26
Click here to see answer by CharlesG2(834)

Question 258796: Solve the system of linear equations.
x/4 - y/11 = -9/44
x/6 - y/13 = -1/26
Click here to see answer by drk(1908)

Question 258796: Solve the system of linear equations.
x/4 - y/11 = -9/44
x/6 - y/13 = -1/26
Click here to see answer by richwmiller(17219)

Question 258793: A runner�s heart rate in beats per minute is given by the formula Heart rate = 65 + 53 / (4t + 1) where t is the number of minutes after the start of a cool-down period. Find the runner�s heart rate in 10 minutes. When is the runner�s heart rate equal to 68 beats per minute?
Click here to see answer by CharlesG2(834)

Question 258827: What is the soultion to the system of equations? y=3x or y=5x-8?
Click here to see answer by Fombitz(32388)

Question 258831: Which of the follwoing is equivalent to 3(x+2) -2(x=4)=9 ?
Click here to see answer by Edwin McCravy(20055)

Question 258825: what is the soulultion to the system of equation of equation?(At what point do they intersect?
Click here to see answer by Fombitz(32388)

Question 258854: please help me solve...
xy = -13 and y = 7/x
both with inputs of 0 and 2
Click here to see answer by Fombitz(32388)

Question 258792: The number of miles remaining for a jet traveling from San Francisco to New York can be approximated with the linear equation Miles remaining = 2650 - 475t where t is the number of hours since leaving San Francisco. In how many hours will the jet be 1,000 miles from New York ?
Click here to see answer by Fombitz(32388)

Question 258880: I need to know about y-intercept. Can you help me please?
Click here to see answer by Fombitz(32388)

Question 258882: ok here is the question and i am completely dumbfounded about these types of questions. here is the question "write an equation in slope-intercept form of the line passing through each pair of points. (3,5) and (2,1).. thnks i will be greatful if you can help.
Click here to see answer by Alan3354(69443)

Question 258884: How do I find the Slope of the line passing through the points (0,-2), (-4,-2)?
Click here to see answer by Alan3354(69443)

Question 258895: Write the point-slope equation of the line that goes through (1, 4) with a slope of -10.
Click here to see answer by checkley77(12844)

Question 258902: Find the point-slope equations of the line using the point (3, 5) and slope 3/2 .

Click here to see answer by Alan3354(69443)

Question 258891: What is an equation for: X: 0 2 4 6 8
Y:12 10 8 6 4
Click here to see answer by Greenfinch(383)

Question 258885: I need help in finding the slope for (0,-9) and (-4,0) thanks
Click here to see answer by checkley77(12844)

Question 258885: I need help in finding the slope for (0,-9) and (-4,0) thanks
Click here to see answer by mathbath(13)

Question 258910: If a line passes through the points (3, 5) and (1, 2), its slope is _______.
Click here to see answer by Greenfinch(383)

Question 258919: The slope of the line below is -1. Write the point-slope equation of the line using the coordinates of the labeled point. The coordinate it (4,-9)
Click here to see answer by stanbon(75887)

Question 258917: y-4=-(x-1)
Click here to see answer by checkley77(12844)

Question 259000: what is the answer to h - 5 > 7
Click here to see answer by drk(1908)

Question 259001: what is the answer to y + 2 < -3
Click here to see answer by drk(1908)

Question 259002: what is the answer to b + 9 < -11
Click here to see answer by drk(1908)

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