Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 42042: A roof rises 9.75 ft over a horizontal distance of 17.24 ft. What is the slope of the roof to the nearest hundredth?

A) 1.91 B) 1.77 C) 0.65 D) 0.57

Click here to see answer by rapaljer(4671)

Question 42001: Please help me solve this equation.
-2x = 8?
a.x = 4
b.2x = -8
c.3x + 5 = 6x - 17
d.3x + = 12x + 17
Thank you
Click here to see answer by nik_consult(24)

Question 42061: X^1/m=Y^1/n=Z^1/p, xyz=1 then m+n+p=?
Click here to see answer by Fermat(136)

Question 42065: Write all the factors of 10.
Thanks from Precious.
Click here to see answer by Fermat(136)

Question 42059: 2x^3-10x^2=0
show work
Click here to see answer by Fermat(136)

Question 42010: please help me solve this problem asap
The cost of a long-distance telephone call is 80 cents for the first three minutes and 20 cents for each additional minute.
a. Write a formula for the total cost,T, of a phone call lasting m minutes.
b. Using the formula,find the total cost of an 8-minute call?
when you solve this can you make sure you explain how you get the answer because i really need to know how to do it when i take my test
Click here to see answer by josmiceli(19441)

Question 42058: 8x(4.7-x)=0
show work
Click here to see answer by fractalier(6550)

Question 42129: please help me solve this equation, i know this is an easy problem but i have to make sure its right.
.2r=68
i divided 68 by 2 and got 340 and that dosent seem right to me
Click here to see answer by fractalier(6550)

Question 42131: Write the equation of the line passing through each of the given pairs of points. Write your result in slope-intercept form, where possible.
(-1,3) and (4,-2)
Click here to see answer by tennislver116(2)

Question 42140: Compute the radius of a circle that has an area of 125cm2. Express your answer to the
nearest 10th of a cm (centimeter). You may use 3.14 as an approximation for P (pi). Do NOT enter the units.
THE ANSWER I GOT WAS 6.3 CM. BUT ASKS FOR ANSWER IN NEAREST 10TH OF A CM. IS MY ANSWER CORRECT, OR WOULD IT BE 63.0 CM.
Click here to see answer by abcdefg(37)

Question 42150: Solve the equation
(y - 7) - (y + 6) =9y
Click here to see answer by checkley71(8403)

Question 42150: Solve the equation
(y - 7) - (y + 6) =9y
Click here to see answer by fractalier(6550)

Question 42135: Write the equation of the line with given slope and y-intercept. Then graph each line using the slope and y-intercept.
slpoe: 3/4;y-intercept;(0,8)
Click here to see answer by checkley71(8403)

Question 42154: Glenn can row 7 mph in still water. If it takes him the same time to row 6 miles downstream as it takes to row 4 miles upstream, what is the rate of the crrent?
Click here to see answer by Paul(988)

Question 42164: Write the equation of the line with given slope and y-intercept. Then graph each the line using the slope and y-intercept.
Click here to see answer by fractalier(6550)

Question 42163: Write the equation of the line with given slope and y-intercept. Then graph each the line using the slope and y-intercept.
Click here to see answer by fractalier(6550)

Question 42156: PLEASE HELP ME SOLVE THIS PROBLEM

WHAT IS 5 x 1/5n equal to?
can you explain to me how you get the answer
Click here to see answer by fractalier(6550)

Question 42132: Rewrite into standard form (0,5), m=-3/5
Click here to see answer by fractalier(6550)

Question 42191: Driving down a moutain, Tom finds that he has descended 1800 ft. in elevation by the time he is 3.25 mi. horizontally away from the top of the mountain, find the slop of his descent to the nearest hundreth.
Click here to see answer by psbhowmick(878)

Question 42192: write the equation of the line with given slop and y-intercept. slope:-2 and y-intercept (0,4) is it y=-2x+4?
Click here to see answer by psbhowmick(878)

Question 42188: Are the pairs of lines parallel, perpendicular or neither.
Line 1 through (8,5) and (3,-2)
Line 2 through (-2,4) and (4,-1)
Click here to see answer by psbhowmick(878)

Question 42182: Explain in complete sentences why these two equations are equivalent.
a) x + 3 = 9
b) x - 3 = 3
Thank you for the help Precious
Click here to see answer by psbhowmick(878)

Question 42175: problem 24 in our self practice i need help

complete the ordered pairs so that each is a solution for the given equation
3x +4y =12 (0, ) , ( ,3 over 4) , ( ,0) , (8 over 3, )
Click here to see answer by psbhowmick(878)

Question 42134: Driving down a moutain, Tom finds that he has descended 1800 ft. in elevation by the time he is 3.25 mi. horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundreth.
Click here to see answer by fractalier(6550)

Question 42176: problem 24 in our self practice i need help

complete the ordered pairs so that each is a solution for the given equation
3x +4y =12 (0,) , (3 over 4) , (,0) , (8 over 3 , )
Click here to see answer by psbhowmick(878)

Question 42151: Solve the equation
-0.5(30,000) + 0.15p = 0.02(30,000 + p)
Click here to see answer by nik_consult(24)

Question 42278: please can you help me with this questions:
1.5y =30
y=
2.4c =20
c=
3. 2x+4=10
x=
4.5a-15=10
a=
5.3x-5=13
x=
6.18-3y=3
y=
7.4c+1=9
c=
8.5+2a=11
a=
Click here to see answer by psbhowmick(878)

Question 41709: Q- how many milligrams of ibuprofen remain in the blood 1 hour after 400mg has been swallowed n= milligrams t= hours

could someone pleas help me solve this
thanks mike
Click here to see answer by PaulAllen65270(19)

Question 42297: graph the following equation and give the points
y=-3x-2
Click here to see answer by Nate(3500)

Question 42153: please help me
n
-=8 i have the answer but how do i check it, i know this is easy but i need
4 help

Click here to see answer by Nate(3500)

Question 42298: In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollrs c of producing these items are related by a linear equation. Projections are that 100 items will cost $10,000 to produce and that 300 items will cost $22,000 to produce. Find the equation that relates c and x.
Click here to see answer by fractalier(6550)

Question 42284:
Click here to see answer by PaulAllen65270(19)

Question 42308: BOB & MARY EACH HAVE APPLES
IF BOB WERE TO GIVE MARY 2 OF HIS APPLES MARY WOULD HAVE TWICE AS MANY APPLES AS BOB. HOWEVER, IF MARY WERE TO GIVE BOB 2 OF HER APPLES, BOTH MARY AND BOB WOULD HAVE THE SAME NUMBER OF APPLES. HOW MANY APPLES DOES BOB AND MARY TO START?
Click here to see answer by fractalier(6550)

Question 42316: t^2-8t-9 over t^2+5+4
show work
Click here to see answer by Nate(3500)

Question 41644: If Y varies directly as X and X=88 when Y= 110, find X when Y= 70
Click here to see answer by Nate(3500)

Question 42315: t^2-9 over 5t+15
show work
Click here to see answer by longjonsilver(2297)

Question 42314: x^2 over 4x-12
show work
Click here to see answer by nik_consult(24)

Question 42296: graph the following equation and give the points
y=-4x
Click here to see answer by venugopalramana(3286)

Question 42317: x^3-27 over 5x^2+15x+45
show work
Click here to see answer by tutorcecilia(2152)

Question 42295: graph the following equations and give the points
y=2/3x+1 , y=-3x-2
Click here to see answer by venugopalramana(3286)

Question 42294: graph the following equations and give the points
y=2x , y=2x+1
Click here to see answer by venugopalramana(3286)

Question 42407: Show your work
7x - 2 + 3x - 9
Click here to see answer by prabhjyot(165)

Question 42407: Show your work
7x - 2 + 3x - 9
Click here to see answer by jmg(22)

Question 42426: My algebra is very, very rusty and I would like help with the problem below:
I have a 50% solution that I would like to mix with a 0.20 ml solution and achieve a final concentration of 6%. Please help me calculate the volume of the 50% solution that I will need to add to the 0.20ml to achieve a final concentration of 6% using an algebraic equation.
Click here to see answer by stanbon(75887)

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, 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, 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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, 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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